Answer:
The answer is D. The autonomic nervous system.
C. The number of covalent bonds is equal to the number of unpaired valence electrons. For example, nitrogen and phosphorous both have 3 unpaired valence electrons thus forming 3 covalent bonds.
Answer:
b is the correct answer of your question
Parasite I think because it is using other plants for nutrients
Answer:
Tips for helping patrons to manage material.