Which of the following is an example of parasitism?
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a. algae living on a sloth, giving it camouflage
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b. two fish protecting each other from predators
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c. tree frogs using the trees to hide from predators
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d. fleas living on a dog, making the dog ill
subm

The correct answer is d. Parasites take what they want from the host not trying to help out the host.

Explanation:

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.