Nomenclature of “positive” and “negative” had already been so well established in
the scientific community that no effort was made to change it. Thus, we describe
the direction of current based on
_movement, which is the
direction of
not the direction of the
actual
through a wire is rather a

b.a device that inputs heat into a cool object

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explanation:

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.