C. Mutuality Relationship.
They have a mutual relationship by which both benefit.
When the hummingbird takes a sip off the daffodil, they are not sucking their strength out, they are simply sucking out pollen, which they then transfer to other flowers.
This process benefits both the plant and the bird.
Answer: Aorta
Explanation: The aorta is the largest artery in the body. It carries oxygenated blood from the left ventricle of the heart into systemic circulation. The aorta has many subdivisions that branch off into smaller arteries.
I believe it is "All living organisms are composed of cells."
The correct answer in this question is letter B. Through adaptation, an organism increases its chance of survival. This intensifies the fitness of species. A population may lead to extinction if its species did not adapt to the environmental changes.
Reproduce asexually because I just put it in and I got it right.