Which has the largest rate constant, K? A. Copper statues turning green
B. Skin tanning in the sunshine
C. Chemical changes causing leaves to brown in the fall
O D. Dynamite exploding

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

catya your not at all which answer i've seen you do this on another question!