29. which of the following best describes animal
species that function as a “keystone” (line 35)?
a. they are a major factor in disease
prevention.
b. they are a food source for other animals.
c. they pollinate every plant species.
d. they are crucial in maintaining the
balance of their ecosystem.
e. they generate the oxygen in the
atmosphere.

The following question asks about one or more selections from your literature textbook. you may use your textbook to answer this question. both “lob’s girl” and “jeremiah’s song” contains flashbacks. in a paragraph, explain what this plot technique adds to the stories. support your answer with one detail from each story. use the reading selections to you answer the questions.