Why is an extra day added to the calendar every 4 years? A. Earth's day is actually less than 24 hours long. B. Earth's day is actually more than 24 hours long. C. Earth's year is actually less than 365 days long. D. Earth's year is actually more than 365 days long. Halpp pwease! :>

Explanation:

Earth's year is actually more than 365 days long. It is 365.25 days long. The .25 results in an extra day after four years

c. glycolysis

explanation:

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: