Proteins<span> are large, complex molecules that play </span>many<span> critical roles in the body. ...</span>Proteins<span> are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that </span>can<span> be combined to make a </span>protein<span>.</span>
Answer:
All of the above.
All the above is the cause of water movement.
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The threshold velocity for silt is <span>lower than the threshold velocity for sand</span>