Assuming the bolded words are: <em>"for strong bones and teeth"</em> and that you had to choose between:
- <em>noun phrase</em>
- <em>adverb phrase</em>
- <em>verb phrase</em>
- <em>adjective phrase</em>
It is an adjective phrase (4).
An adjective phrase is a group of words complementing, specifying, or modifying a 'head' adjective in the sentence. It is called an adjective (or adjectival) phrase because the whole group of words functions as an adjective, which means it provides information about a noun.
Here, the adjective phrase "for strong bones and teeth" is specifying the head adjective "essential." It is functioning as an adjective for the noun "calcium" by giving us information about it.
 
        
             
        
        
        
Answer:
1. I  2. F 3. F  4. F   5. I   6. I   7. F
Explanation:
 
        
             
        
        
        
Every year, millions of monarch butterflies migrate from the forests of Canada and the northern United States to the forests of Michoacán and the State of Mexico where they hibernate and reproduce. During the summer they return to the north of the continent, and are usually carried out by the descendants of those who emigrated to Mexico
        
             
        
        
        
It is a Common noun I believe