sentences: a leaf is a part of a tree & an oak is a kind of tree & shape of the parts of something is a property of that something -> the size of elm june branch is a public of elm cause the shape of oak trees leaves is a property of oak trees  a maple tree is a kind of tree & a branch is a whole of a specific & shape of the parts of something is a property of that something -> the shape of maple trees leaves is a property of maple trees the shape of maple trees leaves is a property of maple trees  the size of elm june branch is a public of elm cause & the shape of maple trees leaves is a property of maple trees & trees of different species have differently shaped leaves -> oak trees and maple trees have leaves of different shapes properties oak trees and maple trees have leaves of different shapes properties  oak trees and maple trees have leaves of different shapes properties & classifying means grouping objects / materials by their properties -> elm corrosive and shoes otters can be nutrient by the size of their branch oak trees and maple trees can be classified by the shape of their leaves  elm corrosive and shoes otters can be nutrient by the size of their branch & classifying is similar to telling the difference -> we can tell the difference of oak trees and maple trees by the shape of their leaves