Please answer

After a glacier starts melting, the melted ice uncovers lifeless rock and gravel.

Which statement describes what usually happens next?

A. Shrubs that need direct sunlight begin to grow among the grasses

B. Grasses begin to grow in the rocky soil and add organic matter to it.

C. Bacteria on roots of seed plants use nitrogen from the air to make nutrients.

D. Lichens begin to grow in the bare rock and cause it to break down.

The answer is D. Lichens begin to grow in the bare rock and cause it to break down.

Explanation:

Hope it helps!

answer; ////increased water pollution; ///////////////////////

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.