which most likely indicates a chemical change has occurred?\n a solid substance becoming larger\n a solid…

Brief Explanations:

A chemical change involves the formation of new substances. A solid becoming larger could be due to physical growth (like crystal growth). A solid melting to liquid (e.g., ice to water) is a physical change (change of state). A liquid freezing to solid (e.g., water to ice) is also a physical change (change of state). However, a color change in a liquid (from green to red) is often an indication of a chemical reaction where new substances with different properties (including color) are formed.

Answer:

a green liquid becoming a red liquid