Question

so far we know three things:
to clean these birds we need a substance that can dissolve in both oil and water
oil is nonpolar and dissolves in nonpolar substances
water is polar and dissolves in polar substances
what does this mean for the molecule we are looking for?
it must be polar
it must be nonpolar
it must be neutral
it must be an ion
it must have polar and nonpolar regions
none of the above
all of the above
notice the difference in the electrostatic potential maps around a nonpolar molecule like oil and a polar molecule like water.

Explanation:

Since the substance needs to dissolve in both polar water and non - polar oil, based on the principle "like dissolves like", it must have regions that can interact with both. Polar regions can interact with water (polar) and non - polar regions can interact with oil (non - polar).

Answer:

It must have polar and nonpolar regions.