Answer:
A
Explanation:
Earth's orbit is not constant because it does not travel in a circle but more of an ellipses.
Answer:
According to the BBC, Saber-tooth cats went extinct roughly 10,000 years ago and it is suggested that their closest living relative might not be the tiger or the lion, but the clouded leopard. The saber-toothed salmon is another animal that is extinct but there are some still alive today: walrus; musk deer and warthogs.
Explanation:
Just here for the points sorry luv 2A.)true
Ions are atoms which have a missing electron or an extra one. This is what gives the ion its positive or negative electrical charge. Isotopes are atoms which contain a different number of neutrons.