The underlined portion of the sentence "Doctors who are compassionate tend to put people at ease" is an adjectival clause.
Here's why:
1. Adjectival clauses function as adjectives by providing more information about a noun or pronoun in the sentence.
2. In this case, the adjectival clause "who are compassionate" describes the noun "Doctors" by specifying what kind of doctors are being referred to - those who are compassionate.
3. Adjectival clauses often start with relative pronouns like "who," "which," "that," etc., and they add descriptive details to the noun they are modifying.
Therefore, in the sentence provided, "who are compassionate" is an adjectival clause because it describes the type of doctors mentioned.
