Select a word: Double-tap it (or tap the text, then tap Select).
Select a paragraph: Triple-tap it (or tap it simultaneously with two fingers).
Select a range of text: Double-tap a word, then move the selection handles
to include the range of text you want to select.
Select text and its formatting marks: Double-tap a word, then move the selection handles
beyond the current paragraph.
The selection includes the entire paragraph and its formatting marks (“invisibles”). You can move the selection handles up or down to include or exclude paragraphs from the selection.

Tap outside the selection to exit paragraph selection.