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Answer: Make an effort to properly dispose of plastic trash and recyclables.
This sentence is the one which correctly makes a call to action. The second option does not serve as a conclusion because it is introducing new information (the island of plastic waste). The third option similarly introduces new information (the way plastic stays in the ecosystem). Finally, while the last option sounds like a conclusion, it is not directly related to the main idea of the text, which is the dangers of ocean pollution.
The sentence that completes this conclusion with a relevant call to action is A. Make an effort to properly dispose of plastic trash and recyclables.
What is a call to action?
A call to action simply means a term that is used to prompt an immediate response to a particular thing.
In this case, the sentence that completes this conclusion with a relevant call to action is to make an effort to properly dispose of plastic trash and recyclables. This is important in order to keep the environment clean and ensure that people are healthy.
Learn more about call to action on:
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