To keep food from entering your lungs, the body's digestive and respiratory systems must work together.

I'm not sure if not sure what the question is but I'll take a stab and say it was a true/false. The answer is true.

Explanation:

There's a tiny flap of tissue and it covers the airway when we drink or walk. Sometimes it may spasm or contract late and this is why sometimes people say, "It went down the wrong pipe!" hope this helps.

b is the best answer for this question.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: