I thnk it is age hope it helps
18.D
19.A
20.C
21.B
theses are going to be your answers
Tree thinning I'm guessing. I had just learned this recently but I could always possibly be wrong.
1. The revenue of gingerbread decreases as the years go on.
2. Gingerbread was close to reaching $25000 of revenue in 2007
3. Peanut butter had the least amount of revenue