Answer:
B. If not B, then C.
Explanation:
Reflex arc, neurological and sensory mechanism that controls a reflex, an immediate response to a particular stimulus.
The primary components of the reflex arc are the sensory neurons (or receptors) that receive stimulation and in turn connect to other nerve cells that activate muscle cells (or effectors), which perform the reflex action.
Answer:
Acid rain etc.
Explanation:
Climate change, ocean acidification, carbon emissions, urbanisation, wastewater treatment, ozone depletion, water contamination, species extinction, and other environmental issues affect every individual, plant, and nation on earth.
These worldwide ecological threats are unlike those that mankind has previously encountered.
