How much time does the average adult spend in conversation? \?

An average adult spend about "30 percent of waking hours" in conversation. 

The term conversation is used for intelligent correspondence between at least two people. The improvement of conversational abilities and manners is an essential piece of socialization. The advancement of conversational aptitudes in another dialect is a regular focal point of dialect educating and learning.

answer; /// the answer to the first question is (b) it began when people first deliberately seeds; /// and (d); // it gave people a steady food supple for the first time;

the answer would be in this answer. someone already asked the question.