which is the most important role of the Nile River in the development of Egyptian civilization? A. the Nile was used for transportation B. The Nile protected Egypt from foreign intruders C. The Nile made the nearby lands fertile.

changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light-sensitive film" is the one among the following statements about working principle behind a basic still camera is true.