Which gravitational pull has the greatest effect on tides?

a.) earth's gravitational pull on the moon

b.) the sun's gravitational pull on earth

c.) the sun's gravitational pull on the moon

d.) the moon's gravitational pull on earth

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.