The sun unevenly heats the minerals in a rock, causing the rock to break. this is an example of

The answer is physical weathering. It is out of uneven expansion and contraction that the rock breaks forming soil

answer; (b); i believe its indefinite existence of human population in a healthy and prosperous condition;

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.