10. Why does the author mention “dead insects” in line 23?
A. To compeer the social behavior of ants with those of other infects.
B. To emphasize the dangers that all insects encounter.
C. To argue the superiority of ants over insects.
D. To indicate a behavior that is common among various kinds of ants.
11.Which of the following terms is defined in the passage?
A. pheromones (line 2)
B. colony integrity (lines 11-12)
C. mass migrations (line 14)
D. private messages (lines 18-19)