How doelectric field lines indicate the strength of the fielt?
by how long the lines are
by how else the lines are
by the direction the lines are pointing
by showing the charge that creates the lines
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answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.