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.

Dark area, determining factor on Groundhog's Day — CodyCross Answer | CodyCross Solutions