C. The maximum energy required to move one electron to the valence shell.
Answer:
mountains
Explanation:
A mountain can be defined as a land-form that has characteristics of high elevation and high relief. Mountains rise above the land and rise to form a peak. It is because of the high elevations that the climates are cooler in the mountainous regions as compared to the sea level. The mountains are elevated, have relief, and have steepness and continuity.
It should be D or A i’m not sure