An individual's ecological footprint is equivalent to the: total amount of food consumed by that individual.
Parasitism is an interaction in while the host is harmed
The red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body.
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Viruses need to be inside a living thing (of course the living thing has to have the right temperature which most living things do) . When they're inside a living thing they start injecting the host's cells with its DNA in order to make more copies of itself which allows the virus to spread. So basically viruses need to be inside something living.
I agree with the other person you answered the answer is B duckweed growth
