The correct answer is color vision.
The macula lutea is an area near the center of the human's eye retina. It has an oval shape and is responsible for the high-resolution color vision we have under good light conditions. If the macula lutea is destroyed, due to macular degeneration or a retinal detachment, then this color vision is impaired.
When they interact with each other the organism is gonna die
It’s a place that has lots of fish and they catch a lot fish there.
If the conclusions do not support their hypothesis they would start the experiment all over again and see what they did wrong. <span />