Question

3 chemicals used on crops to control insects affect ocean ecosystems when they-
a) are washed into oceans, adding harmful substances. (color black)
b) change the climate and change ocean temperature. (color grey)
c) are made by using the salt found in ocean water. (color orange)
d) make rain water more acidic, destroying coral reefs. (color light blue)

Explanation:

Crop insecticides enter ocean ecosystems primarily via surface runoff, where rain or irrigation washes the chemicals into waterways that flow to the ocean, introducing toxic substances that harm marine life and disrupt ecosystems. The other options are incorrect: crop insecticides do not drive climate/ocean temperature change, are not made from ocean salt, and do not directly acidify rainwater to damage coral reefs.

Answer:

a) are washed into oceans, adding harmful substances. (color BLACK)