<h2><em>D. Determine valu</em></h2><h2><em>I took the test (I got a A btw)</em></h2>
Sponge ? i may be wrong though
Blood vessels expand during hot weather and retract/ tighten in cold weather
The purpose of saliva serves in digestion is to breaks down complex carbohydrates. The correct option is (A).
<h3>What is saliva?</h3>
Saliva is a transparent liquid secreted by glands present in the mouth. Saliva is an important secretion for the digestion of food in the mouth.
It is made up of water and many digestive enzymes are present in the saliva, which help in digestion of complex carbohydrate like starch.
Thus, the correct option is A) breaks down complex carbohydrates.
Learn more about saliva
brainly.com/question/8286678
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