Will give brainliest and 50 points!
which is the best example of decreasing entropy?

a box of nails is left in the rain and the nails rust over time.
a pile of dirt on a floor is cleaned up with a broom.
a puddle of water is exposed to the sun and evaporates.
a tree in a forest grows naturally over 10 years.

Entropy:

a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system.

To decrease entropy you would want to put things in order or lower the disarray.

So in this case the best example of decreasing entropy would be cleaning up the dirt on the floor.

Hope this helps.

B

Explanation:

B. A pile of dirt on a floor is cleaned up with a broom.

Hope this helps

-Amelia