Plants breathe co2 and release o2, while animals generally breathe o2 and release co2. this is an example of an interaction between:

Nimbostratus is the correct answer.
explanation: nimbostratus clouds are the type of clouds that are mostly likely present on gray, rainy day. these clouds produce continuous rain, snow and there is no thundering or lightening either.

The answer is observations and interpreting.

The gens present in the dna in the nucleus of the cell in the body