The possibility of down syndrome increases as the mother's age increases because

The probability of the chance for getting the Down's syndrome is high as the maternal age increases because of the age related discomfort abilities.

When problem arises in the cell division of the chromosome number 21, it leads to a syndrome called as Down's syndrome. If both partners involved in reproduction process are healthy and fit, the zygote formation happens in a positive manner.

As per the condition given, if the maternal age increases, the possibility for the fetus to get affected with Down's syndrome because as the age increases, the body related activity starts to reduce. The chance for an elder woman to conceive a kid with Down's disorder increment with age on the grounds that more aged eggs have a more serious danger of inappropriate chromosome division.  

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