Answer:
He could make a macromolecule which is made up of carbon and hydrogen only.
Explanation:
An atom a fundamental piece of matter that constitutes a chemical element.
A molecule is a group of atoms bonded together. It represents the smallest fundamental unit of a chemical compound that can participate in a chemical reaction.
The red balls denote the hydrogen and black balls denote the carbon. He could make a macromolecule which is made up of carbon and hydrogen only.
If the population/number of the things they need decrease, so will the number of the organism
It is option D that is <span>Brownfields tend to be cooler and drier than other areas.
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