Definition of: number and variety of living organisms; includes genetic, species, and ecological types.

Number and variety of living organisms; includes genetic, species, and ecological types. This is the total amount of all living things within a specific area. This is a group of plants and animals in the same region that have adapted together to the region's environment. These are all the living organisms on earth.

explanation:

okay now i don't know this but for the pints nothing else to say bye

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds