Is it true that the struggle between organisms to survive in a habitat with limited resources called natural selection

the answer is c.) there is a warm front in region a and a stationary front in region b.

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