What force is used to make the back-and-forth motion of a swing higher?
A.
scrape
B.
pull
C.
push

its a

Explanation:

scrape - push or pull a hard or sharp implement across (a surface or object) so as to remove dirt or other matter.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.