An algal bloom is caused by an overgrowth of algae in a lake. This decreases the amount of dissolved oxygen, leading to the death of many species of fish. What effect is this? OA direct effect
OB. indirect effect
Ос. cascading effect
OD keystone effect​

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

one centimetre is equal to 0.01 metres

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.