Which interaction best illustrates the concept of mutualism?
a) jaguars feeding on wild pigs.
b) squirrels playing with other squirrels.
c) malaria protozoans living on the blood of a host.
d) nitrogen-fixing bacteria in root nodules of legumes.

answer; (true);

male citizens in athens could vote on all the decisions that affected the city and serve on juries. however, democracy was not open to everyone. citizen women and children were not allowed to vote. slaves and foreigners living in athens (known as metics) were banned from participating in government.