Notice how this chart illustrates how there need not be only one cause and effect. There could be several causes for a given effect...My good grades, my good attitude AND my helpfulness in the classroom might have all CAUSED me to get the Good Citizen Award. On the flip side, one "event" or cause such as a tornado might produce multiple EFFECTS such as building damage, torn up landscapes and bodily damage.
Sometimes authors use words that signal when a cause or effect will be shown.
Here are some signal words to watch for:
because therefore due to accordingly for this reason so that consequently nevertheless in order to if...then
Here is a poster which illustrates it all: