Sweating and panting are examples of which characteristic of life?
a. responding to the environment
b. using energy
c. reproducing
d. growing and developing

A: responding to the environment

bc blah

explanation:

bc blah

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.