Select all that apply. pathogens include:
protozoa
viruses
algae
fungi
bacteria
parasites

The correct answer is- Protozoa, Viruses, Algae, Fungi, Bacteria.

Pathogens can be described as disease causing agents ( also called infectious biological agents) that cause illness as they invade host organism.

Example of pathogens-

virus ( such as human pappilomavirus that causes cerival cancer),

bacteria ( such as Salmonella typhimurium that causes typhoid) ,

protozoa ( such as Entamoeba histolytica causing amebiasis),

fungi ( such as Candida species causing fungal infection) ,

algae ( that can produce algal blooms, which releases harmful toxins).    

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