Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to identify an elm tree [title] Examine the leaves of the tree. [step] Elm leaves alternate along two sides of the stem. The leaf is oval in shape and comes to a point at the end.

Ending1: If you select to examine the oak, listen to the bark that blooms and hear if the branches sound hollow. Note the general shape of the oak tree and gather data on its overall shape. Ending2: The reason the leaves are grouped together is that they create a vertical arc. [substeps] The leaves do not rhyme, however, nor change colour more than once. Ending3: The edges of the leaf are jagged and the veins are prominent. The base of the leaf is slightly asymmetrical. Ending4: While they are thick, they mostly have a flat topure--flexible and fairly dense, unlike the larger leaves of european elm trees and fir ferns. [title] Identify a tree without a main trunk.

Answer format: ending1/ending2/ending3/ending4