Casey’s persuasive speech contained the following statement:The decline in the U.S. bat population has reached critical proportions. Since 2006, more than six million bats in 23 states have been killed by a fungus called white-nose syndrome. The shrinking number of bats has serious consequences, not only because bats eat insects that are harmful to trees and crops, but because they eat mosquitoes, such as those that carry West Nile virus.Which of the three basic issues of persuasive speeches on questions of policy did Casey address in this excerpt?

need

Explanation:

Question of policy is basically a question whether or not an actions should be performed in order to change the existing conditions.

In analyzing the question of policy there are three issues:

1) need - determining is there a serious problem and is there a need for solving it

2) plan - if such a problem exists what is the plan (course of action) for solving it

3) practicality - if the plan is accepted, will it soove the problem or will it just make it worse and open some new issues

Casey's speech contains pointing out the problem and providing the evidence to support the claim. The speech doesn't suggest any plan nor further analysis, rather it just states the problem which can affect both, the crops and people.