Help plz this is science but i dont see that option

Sorry if this is late but your answer is in the picture below,

Explanation:

If those boxes are touching they would transfer the same amount of heat and coolness that would evenly distribute the temperature.

Hence, the answer is the one on the very right top corner.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.