Which best describes an acid?

An acid is a material that can deliver proton or hydrogen (H+) Its particle or ion capable of giving a hydron

Explanation:

It's not my exact answer I used google

A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.

Explanation:

An acid is a material that can deliver a proton or hydrogen ion (H +). Hydrogen chloride in water suspension ionizes and converts to hydrogen ions and chloride ions. An acid is a particle or ion capable of giving a hydron (proton or hydrogen ion H+), or, alternatively, able of creating a covalent bond with an electron pair (a Lewis acid). The first level of acids is the proton donors or Brønsted acids.