A) they needed to feed the population and to trade
From the prehistoric, our humanity had found a way to communicate or exchanging back and forth as well. That's is to build a group of people or organization in order to help each other and solve the neccesary problems. At first, we just called this is a group or a team which involves many members and individuals but later on, it became the society where all people had their own jobs and the rules were also set up. Society has the great impacts on the living standard of each households and the governments of each nations. Because of that, each countries is trying to improve the society to bring its best value to us.
Answer:
retroactive interference
Explanation:
Generally, interference is of two types:
1. Proactive interference.
2. Retroactive interference.
Retroactive interference: The term retroactive interference is defined as the inability to remember old information after the formation of new information. In other words, retroactive interference plays an important role in memory as it restrains the capability of old information by new information. It holds back a person to remember old memories.
Answer:
Adverse impact occur on food web.
Explanation:
There is adverse impact of the change in resources on food web of an ecosystem because food web depends on resources of the environment for their growth and survival. If the producers produce less amount of vegetation due to unfavourable environmental conditions, it greatly decrease the population of herbivores because food is not available in sufficient amount that decreases its population as well as population of secondary and tertiary consumers.