What pronoun do you use for these words Tomas and Susan and the word the lizard what is the answer?

The pronoun for Tomas is 'he' as a subject and 'him' as an object of a sentence or clause.

The pronoun for Susan is 'she' as a subject and 'her' as an object of a sentence or clause.

The pronoun for Tomas and Susan is 'they' as a subject and 'them' as an object of a sentence or clause.

Examples:

Tomas is a teacher. He teaches math at the high school. I met him at a teachers' conference.

Susan is a teacher. She teaches math at the high school. I met her at a teachers' conference.

Tomas and Susan are teachers. They teach math at the high school. I met them at a teachers' conference.

The pronoun for lizard is 'it'. The pronoun for the plural, lizards, is 'they' for the subject and 'them' as an object of a sentence or clause.

Examples:

I saw a lizard, it ran under your chair.

She loved the lizards at the zoo. They mesmerized her and she wants to go see them again.