TLA stands for many things, but in this case, it stands for three letter abbreviation. In the US(A), there are four very well known and very closely related TLA's. Two contain a two letter US postal abbreviation. The other two do not. Name the four TLA's.
With Labor Day fast approaching, it might be time to plan a picnic in the park. The park I like has a picnic table under a tree by a river. Here's the challenge. Take the words
Tree River Labor Day
Change one letter and rearrange the result to name something you might see in a park on Labor Day.
Think of a four letter word that names (as far as kingdoms are concerned) a certain animal, a certain vegetable and a certain mineral. Rearrange the four letters to name a certain twenty first century farm collective.