Which describes an example of genetic engineering?

a. by replacing a defective gene, symptoms of the disease disappear.

b. vitamin a is added to rice to combat blindness.

c. two roses are crossbred to create a rose with a certain shade of pink.

d. over time, the species developed webbed feet.

because the light is a great source of energy for the plants to survive. (i hope this )

digestion

it excretes wastes

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.