Which value of a in the exponential function below would cause the function to stretch? (one-third) Superscript x

0.3
0.9
1.0
1.5

What's a recharge area? a. the part of an aquifer where groundwater meets a lake or stream b. the part of an aquifer where surface water reaches the water table c. the part of an aquifer that's located between two aquicludes d. the part of an aquifer that's located at a lower elevation