Which sentence is the best hook for a speech about saving sea turtles? some sea turtles have yellow shells, while others have green or black shells. in which ocean can sea turtles be found? sea turtles have populated earth’s oceans for more than 100 million years. are shellfish part of the sea turtle’s diet?

Sea turtles have populated Earth’s oceans for more than 100 million years.

This is the best hook because it makes the listeners interested in how the sea turtles have survived for more than 100 million years. It may also entice listeners by showing the sea turtle as an ancient creature. Questions can be good for a hook, but they need to be more open-ended. If the listeners can already answer the question, then why should they listen to the speech? They shouldn't. The details about the turtles shell is not enough to get people interested. It is more of a so what? or who cares? detail.

citizens are given 25 years of life to prove their worth to society; if they fail to do great things

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long