Question

_____________ means to enclose something tightly, such as is done with stones or tiles, and a filler, when creating mosaics

Answer 1

Your answer would be B)Impacted.
it may not make sense, but if you search up the definition of impacted you "get pressed firmly together, in particular"
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Answer 2

Embedding means to enclose something tightly, such as is done with stones or tiles, and a filler, when creating mosaics. Correct answer: C

Mosaic is  is a piece of art or image made by embedding small pieces of colored glass, stone, or other materials.