Molluscs. hope this helps!
<span>rainwater runoff into local streams </span>
Answer:
Parasites are organisms that infect the body of another living being and live off their hosts to survive. While some parasites create no symptoms in their hosts, others can cause severe illness. Parasitic infections occur when parasites grow, reproduce, or invade organ systems that make their hosts ill.
The answer is surely D cuz I've done this question in a test before. Hoped I helped ;)
