Plz
the mesozoic era was the "age of reptiles." at the end of the mesozoic era, many groups of animals disappeared suddenly. scientific evidence suggests that which of the following occurred at that time?
a.
the animals were hunted to extinction by humans.
b.
a large asteroid or comet impacted the earth.< < < i think
c.
the animals began living underground.
d.
the earth stopped rotating for a brief time.

several times throughout earth's history, major catastrophic events have caused mass extinctions or other major disruptions. some of these catastrophic events have been volcanic eruptions and asteroid impacts.

the immediate effect of both of these events is that a. hot lava coats the surface of the earth, causing all plant and animal life within 200 miles to be destroyed.

b. the surface of the earth becomes very cold and a new ice age begins, wiping out all life on earth.

c. particles of matter are released into the atmosphere, affecting the climate and light received by habitats.

d. water covers the surface of the earth, causing all plants and animals to immediately evolve to live in water.