Which of the following is a balance-strength exercise that requires an individual to step forward with toes pointing straight ahead and then pushing off of the front foot through heel onto the back leg and maintain balance on the back leg?

Single-leg squat touchdown

Explanation:

Single-leg squat touchdown is balance-strength exercise that helps in achieving balance as well as strength of the thighs and legs.

Both men and women can perform this exercise which helps to gain strength in their legs. It results in muscular and strong legs.

This exercise requires to balance on one foot and perform the exercise.

Thus the answer is "Single-leg squat touchdown".

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer