Final answer:
The posterior end of a frog is the back or direction towards the back of the body, while the anterior end is the front or direction towards the front of the body.
Step-by-step explanation:
The posterior end of a frog refers to the back or direction towards the back of the body, while the anterior end refers to the front or direction towards the front of the body.
In the case of a frog, the posterior end would be the hind legs, which are modified for jumping, and the anterior end would be the head and the front limbs.
For example, when a frog jumps, it propels itself forward using its powerful hind legs, which are located at the posterior end of its body.