Which statement is true about natural selection and evolution?

a. evolution is the mechanism by which natural selection occurs.

b. natural selection and evolution both show change over time.

c. evolution and natural selection occur separately in an ecosystem.

The distance a car travels between the time the driver decides to stop the car and the time the driver puts on brakes is called the reaction distance. how does the reaction distance change with speed? a.reaction distance decreases with with speed b.reaction distance stays the same with speed c.reaction distance increases with speed. d.there is not enough information to answer the question