The ability of an object to transfer heat or electricity to another object.

• A. Conductivity
• B. Volume
• C. Solubility
• D. Mass

Answer: (A)

How easily energy moves between objects through a material is called conductivity. It describes how well heat or electrical current can be transferred from one body to another. Metals are typically good conductors because their electrons can move freely, letting heat and electricity pass through quickly. For example, copper is known for high electrical conductivity, and many metals also transfer heat efficiently, while insulating materials like wood or plastic resist that transfer.

The other terms describe different properties: volume relates to how much space something occupies, solubility is about how well a substance dissolves in a solvent, and mass is the amount of matter present. None of these measure how readily energy moves, which is why conductivity is the best fit for this description.