What are the four major points to delivering evidence effectively. Name them and explain them each in detail.

Which revision of this sentence best uses direct characterization?

He had fished in the river since ten years and he was a good fisherman. he know where to found the slim sliver chilwa fish, a big beautiful mahseer and the long moustache singhara. he know where the river was deep but where it is shallow; he knew which baits to use - which fish like worms and which liked gram. edit the above

How does the author introduces his idea of fish depletion in the first few pages of world without fish?