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.

Mindfulness meditation is a practice that involves focus one's attention on the present moment and cultivating a non-judgmental awareness of one's thoughts, feelings, and bodily sensations. Studies shown that regular practice of mindfulness meditation can reduce stress, improve mood, boost immune function, and enhance cognitive performance.

The correct option is Two errors.

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

Error 1: "...involves focus one's attention..."
The verb "involves" must be followed by a gerund (a verb ending in "-ing" acting as a noun) to function as its object. Therefore, "focus" should be corrected to "focusing". This also establishes parallel structure with the subsequent gerund phrase "and cultivating".

Error 2: "...Studies shown that..."
The past participle "shown" cannot act as the main verb of a sentence on its own. It requires an auxiliary verb to form a proper verb tense. It should be corrected to either "Studies have shown" (present perfect tense) or "Studies show" (simple present tense).

Since these are the only grammatical issues in the text, the paragraph contains exactly two errors.