The third part of lras curve is vertical line what does this mean

The answer is the economy is completely efficient. Increases in potential output or a rightward shift in the LRAS curve are usually due to the following: 1. Increases in quantities of factors of production. For example, an increase in the quantity of physical capital, or land (eg. discovery of oil reserves) - the economy is capable of producing more real GDP.

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.

what are the answer choices?