Which of the following categories contains the most species?

a.) class
b.) genus
c.) order
d.) phylum

Could someone me with number one you

What happens whenever a net force acts on an object

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of