All the following statements are true. Which one explains why our ...

[Tirant22]

All the following statements are true. Which one explains why our calendar has leap years?
 
  A) Earth's axis precesses with a period of about 26,000 years.
  B) There is a difference between a sidereal year and a tropical year.
  C) A tropical year is slightly more than 365 days.
  D) Earth's speed varies as it orbits the Sun.

Question 2

In the Tharsis region of Mars we find
 
  A) a huge impact basin
  B) heavily cratered highlands
  C) smooth rolling plains
  D) huge shield volcanoes like Olympus Mons

[hugthug12]

Answer to Question 1

C

Answer to Question 2

D

[Tirant22]

Great answer, keep it coming

[brbarasa]

Thanks for the timely response, appreciate it