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The function of the relative pronoun <em>which </em>in the adjective clause is D) direct object.
It refers to the phrase a snack of almonds, which is also a direct object.
Salamanders can regrow entire limbs and regenerate parts of major organs, an ability that relies on their immune systems, research now shows. ... They then wiped out some or all of the macrophage cells to determine whether these cells were essential for regrowing the limbs.
The prepositional phrase would be "of the state". The word "of" is a preposition.
Examples of other prepositions: before, after, across, within, on, over, under, through, behind
A prepositional phrase has a preposition and a noun/pronoun after it.
It's probably: Sure enough, Shiro was waiting for his master and the evening tid-bit. Then the old man said “Chin, chin!” and Shiro sat up and begged, and his master gave him the food, or maybe: <span>The happiest hour of the day both for the old man and his dog was when the man returned from his work in the field, </span>
