Answer:
Biosphere
Explanation:
The biosphere is the area of Earth where living things exist. The biosphere is divided into regions known as biomes. In general, biomes are areas with a particular type of climate and similar plant and animal species.
A MOLECULE
A molecule is a true representative of a covalent bond.
Yes they are what are your options
Part 1 : a black dwarf is a theoretical stellar remnant part: 2 idk
