Question

Which is an example of acceleration?

A. a girl walks two miles per hour north for three hours.

B. a boy walks two miles in one hour.

C. a girl drives a total distance of 240 miles in just under four hours.

D. a boy walks two meters north, turns west, and walks another two meters.

Answer 1

'Acceleration' is any change in the speed or direction of motion.
Now that we ( I ) have that definition clear, we can look through
the choices:

A). \
B). > No. Neither speed nor direction changed.
C). /

D). Yes. The boy's direction changed.