a chemical reaction between hydroiodic acid and aqueous lithium sulfide will result in hydrogen sulfide gas and salt. What is this salt and its solubility

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood.