Directions (79-83): Each of the following questions consists of a paragraph, which may contain one or more grammatical errors. Read the given paragraphs carefully, and then decide how many errors each paragraph contains.

Regular exercise has shown to have numerous physical and mental health benefits, including reducing the risk of chronic diseases such as heart disease, diabetes, and cancer. Exercise can also help to improve mood, reduce stress and anxiety, and promote better sleep. By incorporating regular physical activity into our daily routines, we can improve our overall health and well-being.

The correct option is Only one error.

Let's analyze the given paragraph step-by-step to identify any grammatical errors:

Sentence 1: "Regular exercise has shown to have numerous physical and mental health benefits, including reducing the risk of chronic diseases such as heart disease, diabetes, and cancer."
• Error: The phrase "has shown to have" is grammatically incorrect in this context. Because regular exercise is not the active agent performing the action of showing, it requires the passive voice construction. The correct phrasing should be "has been shown to have".
• The rest of the sentence is grammatically correct, including the parallel list of conditions ("heart disease, diabetes, and cancer").

Sentence 2: "Exercise can also help to improve mood, reduce stress and anxiety, and promote better sleep."
• This sentence is grammatically correct. The verbs "improve", "reduce", and "promote" are in parallel form, sharing the helper construction "help [to]".

Sentence 3: "By incorporating regular physical activity into our daily routines, we can improve our overall health and well-being."
• This sentence is grammatically correct. The introductory prepositional phrase is properly constructed, and the subject-verb agreement in the main clause is correct.

Thus, the paragraph contains only one grammatical error.