A) Earth moon sun
the moon blocks the sunlight from the ground creating a solar eclipse.
Answer:
Carotid arteries also branch off the aortic arches and supply the head region. Veins bring blood to the left and right atria. Both atria then empty into the single ventricle. Blood from the ventricle thus enters either the pulmonary or body circulation.
Explanation:
Organism in an eniornment can compte for food
I believe its called flagella
I hope this helps