How are most macromolecules synthesized from a small collection of simple molecules ?

Macromolecules are synthesized into a simple collection of small molecules through the processes of dehydration synthesis and hydrolysis. In the former reaction, energy is invested within the system to create a new covalent bond, while the latter releases energy to break covalent bonds enabling the synthesis of macromolecules.

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.