Select the most appropriate option to fill in the blank.

You really need to exercise daily, if you want to live a long and ______ life.

healthy

The most appropriate option to fill in the blank is healthy.

The word "healthy" means in good health or condition. It is the most appropriate word because it accurately describes the kind of life that someone can expect to have if they exercise daily. Exercise helps to keep the body healthy and strong, which can lead to a longer and more fulfilling life.

The other options are not as appropriate.

• Marginal means of little importance or value. It does not make sense in the context of the sentence, because a healthy life is not of little importance or value.
• Shrieking means to make a loud, piercing cry. It does not make sense in the context of the sentence, because a healthy life is not characterized by loud, piercing cries.
• Wealthy means having a lot of money. It does not make sense in the context of the sentence, because wealth is not a prerequisite for a long and healthy life.