Pale Rock Formed From Shells and Sea-Bed Matter
Puzzle 2 of Benefits of Pets Pack
Question is: Pale Rock Formed From Shells and Sea-Bed Matter
and the answer is: LIMESTONE
Word Meaning:
LIMESTONE — An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO₃); and occurring in a variety of forms, both crystalline and amorphous.
Definitions from Wiktionary.