The defining characteristic of deserts is their high daytime temperatures. select the best answer from the choices provided t f

The question is asking whether it is true that the defining characteristic of deserts is their high daytime temperatures. This is actually false, as deserts are defined as places with a very small precipitation - rainfall. In fact, the biggest desert on Earth is Antarctica, which is very cold! Some deserts are hot, for example Sahara, but not all of them.

The peak above is part of the  sierra madre occidentals ,  a chain of volcanic mountains that runs through the middle of central america. 

Why you put last one a? i think is b.