The second agricultural revolution developed at the same time as a large streams of migrants moved from MDCs to LDCs. b vast shortages in laborers existed because of infectious diseases c humans were forming communes and practicing open-field farming d improved genetic modification of food allowed for increased harvests in LDCs. e growing urban markets were demanding increased food production.

d improved genetic modification of food allowed for increased harvests in LDCs.

Explanation:

During the second agricultural revolution which lasted between the 17th and early 18th century, the industrial revolution was also occurring during this period.

This led to an improvement in the level of agricultural production which includes new crop rotation methods, selective breeding of domestic animals, and generally genetic modification of food in less developed areas or countries.

Hence, in this case, the correct answer is option D "improved genetic modification of food allowed for increased harvests in LDCs."

answer; the period of time known as the middle ages;

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation: