Well a theory is when a person comes up with something that they believe is to be true, and they work on projects and other things to show their thinking. theories won't always bee correct which helps us humans grow and come up with new ones
Answer:
B.
that the biodiversity of the coral reefs will decrease if global temperatures continue to increase.
Explanation:
Coral reefs are believed by many to have the highest biodiversity of any ecosystem on the planet—even more than a tropical rainforest. Occupying less than one percent of the ocean floor, coral reefs are home to more than twenty-five percent of marine life.
That students who study make better grades than those who do not.
A numerical expression includes numbers and operations, so if youre wanting a numerical expression for the number 20, all you have to do is add, subtract, multiply, or divide numbers to equal that.
For example, 5+15=20, 4*5=20, 80/4=20, 29-9=20
