Question

is the group of words in bold a phrase or a clause? an accomplished artist, leonardo da vinci was fascinated by flight and drew many sketches of unconventional and surprisingly modern flying machines.

Explanation:

A phrase is a group of words without a subject - verb relationship, while a clause has a subject and a verb. The bolded group "unconventional and surprisingly modern flying machines" has no subject - verb combination; it's a group of words functioning as a noun phrase (describing the sketches).

Answer:

phrase