Question

3. Positioning your feet shoulder-width apart with toes turned slightly out and bending at your hip and knees until your thighs are parallel to the ground would be proper mechanics to begin what exercise?

Abdominal crunch
Bridge
Push up
Squat

4. When would flexibility exercises have the most positive effect?

After you finish eating and fueling your body
After you finish an aerobic warm-up
When you first wake up
Right before you go to sleep

Answer 1

3: squat

4:when you first wake up

Answer 2

The first question describes an exercise known as squat where you basically bend down with your knees and hips leaving your back straight.

I'd do flexibility exercises in the morning to wake up well and before I go to sleep so my muscles could relax. But I think warming up would have the most positive effect after waking up.

Hope it helped,

BioTeacher101