A is a flow of air or water in a particular direction A. current
B. jet stream
C. El nino
D. La nina

A. I think

Explanation:

Hope this helps

the answer is horst.

explanation:

in physical geography and geology, a horst is a raised fault block bounded by normal faults. a horst is a raised block of the earth's crust that has lifted, or has remained stationary, while the land on either side has subsided. the word horst in dutch and german means heap – cognate with english "hurst".

when it gains or loses electrons