Explain how bacteria can be genetically engineered to produce a human protein

Bacteria is genetically modified to produce useful human proteins such as human growth hormone and human insulin.

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.

it would be rhyolitic hope this