Why is biological control sometimes considered the best option to control an invasive species, even if there are some risks?
select all that apply (you may need to pick more than one answer)
a. eradication of the invasive species is impossible
b. it is a much cheaper option than other control strategies
c. the negative effects of the invasive species on native species are severe

b. It is a much cheaper option than other control strategies

c. The negative effects of the invasive species on native species are severe

Explanation:

Biological control is the use of an organism (predator, parasite or pathogen) that attacks another that is causing economic damage to crops. This is a strategy widely used in agroecological systems, as well as in conventional agriculture that uses Integrated Pest Management (IPM).

In addition to being cheaper, this technique reduces the risk of residues on crops such as fruits and vegetables. The technique is to use a predator or parasitoid of a specific invasive species when the negative effects of invasive species on native species are severe.

The cost of this technique is very low, as there is no need to use chemicals.

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