David has gone to the niagara falls with his camera. he wants to click photos of the people around him and also the distant sights. if he can have just one lens with him, which lens would it be?

Since David intends to capture photos of both the people around him and the distant sights, it is advisable for him go with a STANDARD LENS. Once advantage of a standard lens that makes it fit for David's is that a standard lens makes the distance between near and far objects look 'normal'. The focal length of a standard lenses ranges between 35mm - 85mm.

Ithink the answer is "crash causing a major injury."

The answer is cave paintings