Understand the basic structure of an atom, which consists of three main subatomic particles: protons, neutrons, and electrons.
Recall the charges associated with each particle: protons have a positive charge, neutrons have no charge (neutral), and electrons have a negative charge.
Identify that the question asks for the positively charged particle, so focus on the particle with a positive charge.
Recognize that the proton is the subatomic particle with a positive charge, located in the nucleus of the atom.
Confirm that the correct answer is 'Proton' because it is the only positively charged particle among the options given.