Which of the following statement describes dinosaurs during the mesozoic era?

a.

they were very inactive

c.

they were good mothers

b.

they were cold-blooded

d.

they are the direct ancestors to birds 

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.