Lines are capable of creating interesting illusions?true or false?

True.

Explanation: Lines can create illusions. Optical illusions, for example, create a illusion using lines and depth.

the answer is:

c. economic output

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.