Answer:
Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas.
Explanation:
The answer to this question is option A which is a compound.
It is because Zoe is investigating the composition of substance A, an unknown substance.
Using chemical processes, she analyzes substance A and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1.
Finally, she found that the substance is a compound.
Observe,questions/hypothesis,experiment.
