Which sentence uses informal and subjective language? children who are interested in animals would likely enjoy looking at these paintings of lions, tigers, and elephants. these paintings are of different animals, such as lions, tigers, elephants, and other creatures of the wild. kids who like animals would probably like these paintings of lions, tigers, and elephants. these paintings of lions, tigers, and elephants were created with oil paint on large canvasses.

The correct answer is KIDS WHO LIKE ANIMALS WOULD PROBABLY LIKE PAINTINGS OF LIONS, TIGERS, AND ELEPHANTS.

It is uses subjective language because the use of the expression “would probably like” carries a personal opinion based on the speaker’s experience.
It is informal because of the use of informal words such as “kids” and the relatively simple structure (there is one subordinate clause). Also there is a repetition of the verb “like” which is mostly considered simple and vague language.