Answer:
air resistance or drag, (Option B)
Explanation:
Opportunistic infections are infections that occur more frequently and are more severe in people with weakened immune systems, including people with HIV.
Answer:
D. rigidity and shape that's why in plants they stand upright for photosynthetic process.
Inhale and exhale because you inhale the oxygen and exhale the carbon dioxide
I believe the answer is B: Earth's oceans absorb some of the carbon dioxide from the atmosphere.