Why link internally
Links tell crawlers which pages matter.
Paragraph 1: good content answers the question a visitor came with, uses plain language and links to related material so readers and crawlers can follow the thread.
Paragraph 2: good content answers the question a visitor came with, uses plain language and links to related material so readers and crawlers can follow the thread.
Paragraph 3: good content answers the question a visitor came with, uses plain language and links to related material so readers and crawlers can follow the thread.
See also writing for search.