Will give ! there are many natural processes that shape the earth's surface. these processes can act as constructive forces, destructive forces, or both. in general, natural processes act as constructive forces a) only at high elevations. b) only at sea level. c) when they wear down landforms. d) when they build up landforms.

D) When they build up landforms.

Explanation:

This is partially a little simple because construct is basically "build up". Also according to Quizlet, it is D! Have a nice day!!

C.  when they wear down landforms.

i did it in my study island

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

the answer would be a