Why thumbnail for 'make extra money' is a tree?

the irony maybe, to have a tree, which grow up to become a beautiful tree, we need to take care of it carefully. seed it in the best soil, watered it everyday, and fertilise it. same goes with money, to get extra money a lot of things need to be considered. examples are determination and time management. not to be forgetten, basic things like our diet should be keep balance, so that we gonna get good quality of work. thus, making extra money.

It's to counter the saying: money doesn't grow on trees.

Bcoz money is green and so is the leafs. and peopel are tryin to grow money on tree (money plant). thats why the thumbnail for make extra money is tree. btw it was useless question and i really gave an stupid answer. you should ask something important which might help you make money.

make extra money from internet is not easy, because u have to spend extra time for it.if you are sitting at home and u don't have any work you can make money from this. ya you can say that make extra money from internet is tree because green is like prosperity and this bring more good things in your life..