The document discusses various types of cohesion that provide links between parts of a text, including reference, substitution, ellipsis, conjunction, and lexical cohesion. Reference uses words like pronouns to refer to things introduced earlier. Substitution and ellipsis involve replacing or omitting words. Conjunction uses words like "and" and "but" to connect sentences. Lexical cohesion involves repeating or associating vocabulary through reiteration or collocation. Different languages use these cohesion techniques in different ways.