Protected areas are an extremely important part of programs to conserve biodiversity and ecosystems, especially for sensitive habitats. there are two methods of biodiversity conservation: in-situ (natural home) or ex-situ (artificial home). all but one is an example of an in-situ method of conservation. that is a a) national park. b) botanical garden. c) wildlife preserve. d) wildlife sanctuary.

Correct B). Botanical garden

Ex-situ conservation is a process of preservation of biological diversity outside their natural habitats. It includes conservation of genetic as well as wild species living in that area.

Except, botanical garden rest all are the example of an in-situ method of conservation, which involves conservation of species in their natural or similar environment.

Hence, the correct answer would be option B.

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