What is a reason WHY some desert animals are nocturnal?

Explanation:

Nighttime is cooler.

Many desert animals are nocturnal for the evident reason that this helps them avoid the heat of midday. In scorching-hot parts of the world, being nocturnal is simply a good move. Water conservation is also an important aspect of avoiding the heat of the day.

we need the speech to be able to answer your question, reply with it and i'll reply with the answer.

the sentence does not violate the phrase structure second rule (introduced by noam chomsky) because noun phrases consist of a determiner such as a, the or every, and a noun. in the sentence, the noun phrase the cake includes a determiner (the) and a noun (cake).

on the other hand, the first rule indicates that a sentence encloses a noun phrase, followed by a verb phrase. the example sentence can be analysed as follows:

john (n) + ate (v) + the (det) + cake (n).