Answer:
I do believe your answer is D: Most of Earth's mantle is always moving.
Hopefully this helped! :D
Answer:
Well when dogs join something like the police force they are trained to sniff out bombs, drugs, people and etc. Which is very helpful because they can detect things that we can't necessarily detect all the time. Which makes them a quicker method of detecting things.
The second article is the one that has it<span />
