Answer:
Pros of feudalism=
It allowed for a simplistic chain of command
Land management was incredibly easy
It provided a system of co-existence
cons of feudalism=
It was easy to abuse the power given
It was a very isolated existence
freedoms that were obtained were very rarely free
B they are a Keystone species
keystone species
noun
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.