Answer:Nuclear fusion
Explanation:
Which event takes place first in the stages before the birth of a star? Gravity pulls gas and dust together. A protostar forms as mass increases. Nuclear fusion begins under high pressure.
simple mules are a mix of hourse and donky and are born infertle they cant BREED.
A, it is a self-defence mechanism, where they only do it if they have to.
Hope this helps!
I think the answer would be 52cm:24cm ratio but don't take my word for it
