In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[Q]: Question: If Earth's plate tectonics slowed down, Earth's convection would 
 Answer: decrease
[A]: Convection on early Earth was faster and so plate tectonics was faster.


[Q]: Question: An increase in birth rates indicates a/an _____ in the food supply. 
 Answer: increase
[A]: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.


[Q]: Question: When the shards of glass were remelted together, the surface area 
 Answer: decreased
[A]:
As rock breaks into smaller pieces, the surface area of the pieces increases.