In philip’s french class, the students are learning how to pronounce closed vowels and open vowels. the students are most likely studying french
a. syntax
b. phonemes
c. semantics
d. morphemes

The correct answer is: B) Phonemes.

A phoneme is defined as "the smallest unito of sound which is significant in a language". In this case, students are learning how vowels sound in French. It is clear every language has its own pronunciation, vowels won't saund the same in English as in French. So it is important to learn those differences to be able to undestand and speak a new language.

Syntax refers tp the structure or order of elements in a statement, so by learning the pronunciation of vowels it is not adressed.

Semantics is concerned with meaning of words or signs so it is not the correct answer.

Lastly morphemes refer to the smallest gramatical units in language, as students are not analyzing parts of an specific word or words this isn't the answer either.