What is not part of an ecosystem? * biotic factors
water
air
abiotic factors
land

Explanation:

biotic factors

water

air

abiotic factors

land

These all are part of an ecosystem.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.