The answer is A because they need the sunlight to go through the water
D. All of the above.
Explanation - An organism has encountered reproduction, getting energy and staying healthy as their challenge. Limiting factor plays an important role in this. When the amount of limiting factor is sufficient then different organisms try to grow and reproduce but here the competition between the species arise.
Different species need to compete with each other for their food, growth and reproduction. The species that is unable to sustain itself in the amount of limiting factor available tends to get extinct.
Enzymes catalyze reactions by lowering the activation energy of the reaction. Enzymes are made of proteins, and therefore the answer here is B. Protein molecules.
Leaves change color due to changes in length of daylight and changes in temperatures, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.
Sources - Google
Answer:Selective Permeability