Based on my interpretation of this website, I believe it's the astronomers. :)
The answer would be natural hazards.
Answer:
B. Zoo animals are monitored by the U.S. department of agriculture.
Explanation:
The monitoring of the animals is a concurrent action making it an actives verb.
A: Passive already done
C: Passive not yet done
D: Passive already done and been doing
Complex I think I had a question like that yesterday so I think complex
Answer:
lol, sounds like Rizzoli and isles "reddish-brown substance" when it's obviously blood.
Explanation: