Tell which lines or segments are parallel

option 1: a, b

Step-by-step explanation:

The angle markers show that the angles between a and m, and b and m are the same. However, the angles between a, b, and n are not equal. This shows that n and m are not parallel. a and b are parallel.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.