Which best describes the role of primary consumers in a food web? A. Carnivore that feeds on producers
B. Herbivore that feeds on producers
C. Herbivore that feeds on primary consumers
D. Carnivore that feeds on primary consumers

answer: are there any

explanation:

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.