Rafael Is Preparing to Speak About the Degradation of Salt

question 65

Multiple Choice

Rafael is preparing to speak about the degradation of salt marshes. As he prepares he writes, "After listening to my speech, my audience will be able to identify the causes of over-salination and degradation of salt marshes." He begins his speech by saying, "Coastal salt marshes are a safe harbor for plant and animal life, but the over-salination of these marshes is degrading them." He then transitions to a detailed discussion about the pH levels needed for certain life forms to thrive. He adds, "Now this is an important point." He then tells them, "Salt marshes have receded by 10 percent in the past five years." What is his thesis statement?

• A) "After listening to my speech, my audience will be able to identify the causes of over-salination and degradation of salt marshes."
• B) "Coastal salt marshes are a safe harbor for plant and animal life, but the over-salination of these marshes is degrading them."
• C) He then transitions to a detailed discussion about the pH levels needed for certain life forms to thrive.
• D) He then tells them, "Salt marshes have receded by 10 percent in the past five years."

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Definitions:

Range

The difference between the highest and lowest values in a dataset, indicating the spread of the data.

Median

The middle value in a data set, which divides the set into two equal halves when the values are arranged in ascending order.

IQR

The Interquartile Range, which measures the spread of the middle 50% of a data set.

Range

The difference between the highest and lowest scores in a set of data.