The character laying on the ground has just been burnt by a chemical known as potassium hydroxide, made from a potassium atom, an oxygen atom, and a hydrogen atom. this means that potassium hydroxide (like most substances) is a a) compoundb) elementc) protond) electron

This means that potassium hydroxide (like most substances) is a "compound".

In chemistry, a compound is a substance that outcomes from a blend of at least two distinctive chemical elements, so that the atoms of the diverse components are held together by chemical bonds that are hard to break. These bonds shape because of the sharing or trade of electron s among the particles. The littlest unbreakable unit of a compound is known as a particle .  

A compound varies from a mixture, in which holding among the particles of the constituent substances does not happen.