Answer:
A). A keystone species, because it is carnivorous.
Step-by-step explanation:
The keystone species are described as a species that exerts a large, stabilizing influence throughout an ecological community, despite their relatively small numerical abundance. As per the description provided, Venus Flytrap would be characterized as the keystone species as it is a carnivore and the ecosystem's other species are highly dependent on it. Thus, option A is the correct answer.