Please help with these two I’ll give you brainiest!

The first answer would be C. The climate has changed. Tropical turtles are unable to survive in cold waters therefore, overtime the warm water that used to be in that area changed with the climate causing the turtles in the area to go extinct in the process.

The second question’s answer would be D. In this diagram, the barracuda is at the top of the food chain, therefore, all of the organisms it consumed will increase in size because they no longer have a barracuda preying on them.