Answer:
i think its D bec b and c not it
Well the build up of the Carbon dioxide that we exhale, if it doesn't get used by the plants we would have a build up of the Carbon dioxide in the air, which pollutes it. so the air then would be to toxic for the human life forms to live, that includes animals also.
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Specimen collection is the process of obtaining tissue or fluids for laboratory analysis or near-patient testing.
A specimen collection helps a scientist do an experiment by assembling a large number of samples for comparison. A poorly collected specimen may lead to failure in isolating the causative organism(s) and/or result in the recovery of contaminating organisms.
I think the absence of light will will stop the leaves from photosynthesis because light is necessary to make plant food.
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