Answer:
b drag from wind i hope this helps
Explanation:
That's the definition of "free fall".
We can never observe free-fall in our daily life on Earth. There's always
at least one other force besides gravity acting on a falling body, because
it's always falling through air.
The answer is A.....................................................................
The degree of vertex D is if it is an indegree or outdegree, it is 1 degree in vertex D.