The answer is option D "test the effect of cyanide on algae." Ecologist are researchers who study how organisms interact with their environment so in this case they are testing how algae reacts to cyanide. In another example they will be testing how a ape reacts to having a different fruit tree in their habitat. It wouldn't be option A, B, and C because you have to remember the job of a ecologist and the options are not jobs of one.
Hope this helps.
I am thinking D. But I am not sure that it is the answer.
Next organ would be "Small Intestine"
So, option C is your answer.
Hope this helps!
Answer:
iance system
Explanation:
the head is the sledding related
The ocean tides are caused by the gravitational pull of the moon on the ocean. When the moon is closest to the Earth, it causes "high tide", and when it is farthest, there is "low tide".
Additional factors on Earth that can cause tides are storms and the earth's orbit.
