i. Predators.
ii. Decomposers.
iii. Diseases causing micro-organisms/pathogens.
iv. Pollinators.
v. Nitrogen fixing bacteria.
vi. Pests.
vii. Parasites.
OR
i. pest- feed on whole or part reducing quantity and quality/pierce, suck, chew plant parts transmitting diseases
ii. parasites suck fluids from host causing anemia in animals/retarded growth
iii. decomposers act on plant and animal remains forming humus/improving soil fertility
iv. pathogens cause diseases in plants and animals
v. predators kill and feed on other animals reducing livestock produce
vi. pollinators transfer pollen grain enabling cross pollination/hybrid vigour
vii. nitrogen fixing bacteria fix atmospheric nitrogen improving soil fertility
gideon1 answered the question on October 18, 2017 at 07:04
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