Why is trade necessary?

Trade is necessary because others may not have what others have, so because of trading you are able to move forward because you can trade what you have that they may not and vise versa. <3

Trade is necessary because a lot of countries produce and makes stuff that other countries can’t they trade the products so if I had apples and the other country had oranges and we didn’t have apples and they did have oranges then we will trade some of our apples for their oranges