For the first question I would say conspicuous and the second I would say apprentice
Prepositions indicate direction, time, location, and spatial relationships, as well as other abstract types of relationships.
Prepositions indicate relationships between other words in a sentence.
Many prepositions tell you where something is or when something happened.
As the name suggests they generally tell position if something. Like, behind, front, on, at etc.
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.
