It was pollution from the industrial revolution that caused tree trunks to turn from light to dark in color.
Answer:
It necessary that the solar concentrators used by solar power plants be able to move throughout the day: To track the sun as it moves across the sky. The Brainliest Answer! Answer: improvement in a solar panel efficiency using a solar concentration by simple mirror and by cooling.
<span>1. Hind limes tend to be sturdier, stronger and longer. </span>
<span>2. The hind limbs are more firmly attached to the spine.</span>
The answer is the first one.
