Answer:
B. a decrease in vegetation.
Explanation:
For exclusion:
Cannot increase the vegetation.
And increase the soil erosion.
And decrease the quality of air.
Answer:
"Brachiopoda"
Drosal and ventral valves; Individuals resemble clams; May have no anus
"Bryozoa"
Possesses a chitinous zoecium; Anus opening near mouth; Colonies resemble moss