Which three statements about soil formation are true?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.