Near Demonstrative Pronouns in Arabic: هَذا/هَذهِ This (is) fem. / Masc.

In Arabic, demonstratives are nouns, thus they have the characteristics of gender, number, and case.

هذا
is a masculine demonstrative pronoun meaning “this” or "this is". The feminine is هَذهِ

.ما هذ؟ means “What is this?” masc..
هذا طالبٌ means “This is a student” masc.
هذا is definite and it is the subject مبتدأ of the sentence