〜によって変わるって英語でなんて言うの？

A) It depends on the season
B) It depends ..

*Depend
-be controlled or determined by.

Example
-"differences in earnings depended on a wide variety of factors"

*Season-each of the four divisions of the year (spring, summer, autumn, and winter) marked by particular weather patterns and daylight hours, resulting from the earth's changing position with regard to the sun.

a period of the year characterized by a particular climatic feature or marked by a particular activity, event, or festivity.

Example
-"the rainy season"

I hope this helps :-)

Economic theory says that the price of something will tend toward a point where the quantity demanded is equal to the quantity supplied. This price is known as the market-clearing price, because it "clears away" any excess supply or excess demand. In other words:
"Prices are directly related to customer demand." So when customers want more holidays in the peak season, the prices will rise. You may use phrases like:
Directly related
Closely related
Proportionally related

Everything's up in the air at the moment : This is a common phrase used when your plans have not been finalised and cannot be confirmed because you don't have sufficient information to make a decision or because the decision depends on other factors. 'Up in the air' can
be replaced by the word unresolved. e.g. ‘He's now in his final year of study and the future is still a bit up in the air.’
Nothings fixed at the moment: Another natural phrase that indicates plans have not been finalised. used in this sense fixed means confirmed/finalised. The word fixed also means repaired e.g. I fixed my broken bike.
To be confirmed: This phrase can be used when you need to use more formal language such as in a business situation. It indicates that you have plans but they have not yet been finalised.

If you say that one thing depends on another, you mean that the first thing will be affected or determined by the second.

--> The cooking time needed depends on the size of the potato.
--> How much it costs depends upon how much you buy.

You can use any of the above statements in such a situation where one thing is directly affected by another thing.

The words "contingent' "hinging" and "depends on" all mean the same thing.

This means that price is different depending on the season.

Therefore you can say " The price depends on what season it is."

"It depends on the time of the year" - Since different times of the year are categorized into seasons, you are in effect saying that prices vary from season to season.

"Prices are subject to change, depending on the season." -
"subject to change" means that something (in this case, prices) may be changed or adjusted.
In this sentence, you are saying that prices may change, depending on the season/time of the year.

Rests on = His life rests on her as she is the breadwinner in their family.
Depending on = We wear different clothing depending on the weather.

When something (person, place, thing, temperature etc. ) affects or changes the outcome of another

Both of these sentences express that something depends on something.

Hope this helps!

To explain that something depends on something.

Example questions:
Q: Are you going to travel this year?
A: I'm not sure yet. It depends on whether I can save enough money to.

Q:Is it expensive to travel?
A: It totally depends on when you decide to travel. In July it is very expensive but in November it is quite cheap!