Which type of current occurs when surface water on the ocean becomes denser than the water below it and sinks?

Darius is observing a family of geese, which includes a male goose, female goose, and several goslings. when a dog approaches the geese, the male goose hisses at the dog and flaps its wings threateningly. is the behavior of the male goose an example of an adaptation?

Ais a group of individuals of the same that exist together in the same place at the same time

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?