Aman starts his car from rest and accelerates at 1 m/s2 for 2 s. he then continues at a constant velocity for 10 s until
he sees a tree blocking the road and applies brakes. the car, decelerating at 1 m/s? , finally comes to rest. which of the
following graphs represents the motion correctly?

I showed you all calculation . You did not attach any graph to question .

Explanation:

Lets first find Velocity

Vr=o m/s

Ve=?

a=1m/s²

t=2s

a=(Vr-V)/t

1m/s²=Vr-0m/s/2s

2m/s=Vr

Lets find the time neeeded to stop :

a=1m/s²

Vs=2m/s

Vf=0m/s

a=(Vf-Vs)/t

t*1m/s²=2m/s

t=2 s

a) cold, dry

explanation:

continental polar masses are cold and dry air masses because the cold air cannot hold much moisture. as they move into warmer air, they can trigger precipitation.

i believe the answer is a hope it and is correct