Identify what type of sentence the following sentence is. Do you like coffee or hot chocolate better?

Identify what type of complement is in green. My sister is the most interesting person.

Identify what type of complement is in green. The puzzle was very difficult.

Identify what type of complement is in green. My room seemed empty when my sister was at her friend's house.

Identify what type of complement is in green. My brother is so sweet when he wants something.