Luster is the correct answer.
Elements are a one of a class of substances that cannot be seperwted into simpler substances by chemicalk means.
Compounds is a substance formed when two or more chemical elements are chemically bonded together.
Relation: When two elements or more are formed chemically together its called a compound without elements there won't be compounds and without compounds there won't be elements.
A teaspoon of caffeine is <em>NOT</em> deadly as teaspoon of ricin
Answer:
She is making kinetic energy when she lifts the ball and when the ball is above her head the ball gains potential energy.