A natural selection is actually a attribute of a set, made use of to explain its size (how it is quite a few) and distinguish it from other collections. 「関家の森」ではなく「関さんの森」というところがいいですね。親しみを感じます。 There are 2 regular solutions for formally defining natural figures. The 1st a single is named Peano arithmetic and is https://herbaloilforbodypain.blogspot.com/