The egg swelled in distilled water because it is hypotonic to the egg's interior.
Explanation:
Osmosis is representing a movement between hypotonic solvent and semipermeable membrane.
Hypotonic solvent is moving into the higher concentration and that concentration is concentrating the both sides of a membrane. In this case, solvent is the water.
Because of the passive transport, osmosis doesn't need energy.
The correct answer would be D) decomposers. Decomposers do just what they're named for. Decompose things. They break down dead plant and animal material, gaining nutrients from it, while releasing CO2 into the atmosphere.