Identify the adjective in following sentence which student brought his science project?

The adjective in the sentence "Which student brought his science project?" is science.

Here's why:

* Adjectives describe nouns. In this sentence, "science" describes the type of project the student brought.

* "Which" is a pronoun used to ask a question about a specific noun (the student).

* "His" is a possessive pronoun indicating ownership of the project.

Let me know if you have any other sentences you'd like to analyze!