What would be a particularly good stretching exercise to do before going on a run?
a. the calf stretch
b. shoulder bends
c. the torso stretch
d. the chest-and-arm stretch

the answer is A. To do the calf stretch you need to keep your rig leg forward, foot level on the floor, and augment your left leg straight back, putting your heel level on the floor. Try not to twist your back knee. Incline toward the divider until you feel the extend in the calf of the straight leg. Hold for 30 seconds and switch sides.

a particularly good stretching exercise to do before going on a run would be: a. The calf stretch when doing a running exercise, your body will pur a lot of strain to your calf because it is forced to hold your whole body weight everytime you move forward. To prevent injuries, it's better to relax the muscle area in your calfes.

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.