Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to identify spruce trees [title] Look at the needles of the spruce. [step] Before trying to narrow down the species of spruce tree, first make sure that you are not looking at a fir or pine. Examining the needles of the trees is the easiest way to make the distinction between them.

Ending1: The needles of a spruce tree are attached individually to its branches, as opposed to being in clusters. They also have four sides and roll easily between your fingers. Ending2: If you have a firm line, identify knots as small as 32 mm round. If you have a thin line, you should be able to distinguish a spruce tree from a fir or pine by its diameter. Ending3: [substeps] The needles of older trees will be often roughly the same color and similar texture as fir and pine trees. Older evergreens typically have well kept needles. Ending4: Looking at the needles of a fir or pine will give you a good idea of what the tree is capable of doing. [substeps] The needles on fir and pine trees are typically grey or tan in color.

Answer format: ending1/ending2/ending3/ending4