Choose the best description of the relationship between evolution and natural selection.
a. natural selection leads to evolution.
b. evolution leads to natural selection.
c. natural selection is the same as evolution.
d. evolution and natural selection are not related.

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

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem