Answer:
A.
Explanation:
A. Gas exchange happens through diffusion.
Pain in two or more joints.
Raynaud's phenomenon.
Skin changes.
Swollen hands.
<span><span>Muscle weakness.</span>
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A shadow is a surface light cannot touch or reflect off of. Usually shadows appear when the main object is covering a light source. For example, lunar eclipses. Lunar eclipses cause a shadow over Earth because they block the main light source, The Sun from our point of view, casting a giant shadow over Earth.
The first one, it controls the physical traits of an organism. Good luck, hope this helps!
Answer:Whale fall affects ocean deiment because it causes it to move
Explanation: