Which of the Following Best Matches the Description

Multiple Choice

Which of the following best matches the description?
-An environmental condition,the absence of which,prevents the success of an organism.

A) denitrifying bacteria
B) herbivore
C) omnivore
D) producer
E) trophic level
F) community
G) ectoparasite
H) limiting factor
I) none of above
J) secondary consumer
K) nitrogen cycle
L) biomass
M) habitat
N) carbon cycle
O) interspecific competition
P) nitrogen-fixing bacteria
Q) intraspecific competition