Idon’t understand this can someone give me the answer? you

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm