Answer:
The answer is D. Panama Canal.
Low dissolved oxygen concentrations that occur in many bodies of water when nutrients stimulate the growth of algae that subsequently die and are decomposed by oxygen-using bacteria.
Answer:
(1) Less
Explanation:
Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.
It's about the study of the earth. Like mapping, or just looking at different biomes or landscapes.
