Dark Area, Determining Factor on Groundhog's Day
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 177, Puzzle 5 (Species Biomass).
Question is: Dark Area, Determining Factor on Groundhog's Day
and the answer is: SHADOW
Word Meaning:
SHADOW — A dark image projected onto a surface where light (or other radiation) is blocked by the shade of an object.
Definitions from Wiktionary.