In very early attempts to classify organisms, the Greek philosopher, Aristotle, identified all animals as "air dwellers, land dwellers, or water dwellers". Under this system, all of the following organisms
would have been placed in the same group: Bat, grasshopper, eagle, butterfly, flying squirrel, and
sparrow. In the space below, construct a dichotomous key that can be used to identify these 6
animals,

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

Reducing agents  oxidized by the reaction 

The answer is:   [d]:   "ultraviolet" {"  uv  "} .