Oceanologists have revealed the mystery of coral reef colors. It turns out that there are many mutations in the genes responsible for controlling pigment production in corals. The more genes are activated, the brighter and brighter the coral color is. These pigments coexist with corals and are The seaweeds that provide food have a protective effect. In places with strong sunlight, in order to prevent seaweeds from being killed by the sun, coral insects will generate more pigments and the colors of corals will be more vibrant. What's best for this text title? ['Defending seaweed.', 'Mystery of colorful corals.', 'Sun and coral.', 'Dedicated coral.']