Explanation:

Five ways to select text with your mouse

1.To select a word, double-click it.

2.To select a single line of text, click in the left margin next to the line.

3.To select a sentence, hold down [Ctrl] and then click anywhere in the sentence.

4.To select a paragraph, click three times in the paragraph. ...

5.To select the entire document, click three times in the left margin.