It is called seismic waves. That should help:)
Hello There! ^_^
Your question: Oil spills in the ocean affect both the aquatic environment and the ____________.
Your answer: Oil spills in the ocean affect both the aquatic environment and the economy.
The answer is economy.
Hope this helps!
4) Polaris
Stars emit light with energy generated by nuclear fusion, think of the Sun as an example. Polaris is a star, it's the brightest star in the little bear constellation, and therefore the correct answer.
