Which of the following is an exercise that works the pectoral muscle group? O Push Ups
O Backlifts
O Sit Ups
O Donkey Kicks

The answer is Sit ups

Explanation:

Because they work the pectoral muscle group.

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the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.

the insertion of a penis into a vagina.