Can someone help me fill this out? Thx very much, I need to focus on other work and this is very important.

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

Astudent in a skill or trade training program who is learning by gaining experience is a(n) a. mentor b. volunteer c. colleague d. apprentice

Atopography map is used to study changes in vegetation associated with different elevations. which individual most likely used them for this purpose?