The correct answer is the sun.
The Earth's main energy source is the sun. The sun causes convection within the atmosphere, which in turn affects weather and climate.
<span>that the patterns of polarity matched up on both sides is the answer </span>
Answer: D. They are affordable for everyone to install.
Explanation: I hope this helps :)
Endemic diseases result in a decreasing population, so with that said you can rule out choices B and D.
Among the two left, letter A is the most appropriate answer. Not all endemic diseases have an effect on the number of children a population will have. So if we are speaking about endemic diseases in general, the answer is:
A. Endemic diseases can result in decreasing population numbers: many people die form diseases, and others move away from or avoid moving to places where diseases are rampant.
