This document discusses cause and effect clauses. It provides examples of different patterns that can be used to show the relationship between a cause and an effect, including using prepositions like "because of" and "due to", conjunctions like "because", "since", and "as", and transition words like "therefore" and "consequently". It also provides guidance on punctuation for clauses introduced by "because", noting that a comma should be used if the dependent clause precedes the independent clause.