During exponential growth, the rate of growth
a. declines consistently over time.
b. remains steady over time.
c. starts slowly and then accelerates.
d. starts quickly and then levels off.

C.Start slowly and then accelerates

Explanation:

From the graph we can say that exponential growth is slow at the starting point then after it will become steep or we can say then that it accelerates.The slope of graph tends to 90°.

When the resource are unlimited then size follow exponential growth.

So from above we can say that option C is correct.

the answer is c. it will give up it's valence electron to the other atom.