Alake community with four trophic levels suddenly suffers from algal blooms. using the strategy of biomanipulation, an ecologist may propose ) removing zooplanktonb) adding mineral nutrients to the waterc) adding fish that eat zooplanktond) removing fish that eat zooplanktone) removing the fourth trophic level in the lake

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

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

"a.) well–developed vascular system."