Explanation:

Green sea turtles eat seagrasses and algae, though juveniles snack on crabs, sponges, and jellyfish. In the wild, they can live up to 80 years and grow up to five feet long. Once mature, it is the only sea turtle that is strictly herbivorous. Therefore, Statement 1 is correct.

Parrotfish are algae eaters. They obtain the algae by ripping small chunks of coral from a reef. Many other herbivores thrive among the fish population. Other herbivores include the Japanese angelfish, yellow bloth rabbitfish, and tilapia. Therefore, Statement 2 is correct.

The diet of Manatees consists of water grasses, weeds, and algae. Dugongs are related to manatees, which are both endangered and protected animals. These slow-moving herbivores graze on underwater grasses, rooting them out with bristled, sensitive snouts and chomping them with rough lips. Therefore, statement 3 is correct.

Snakes that are viviparous nourish their developing young through a placenta and yolk sac, something that is highly unusual among reptiles. Boa constrictors and green anacondas are two examples of viviparous snakes, meaning they give birth to live young with no eggs involved at any stage of development. Therefore, Statement 4 is correct.