True because any litter left on the ground or in water will pollute
The credibility of a work, especially in academia, deals mainly with the credibility or its source or author. This may mean that the author's work has been well-regarded in the past.
The relative clause that best fits the sentence 7 is "that they learned during the school year".
<h3>What is a
relative clause?</h3>
These are clause that can be used to give additional information about a noun.
Here, the relative clause that best fits the sentence 7 is "that they learned during the school year".
Therefore, the Option D is correct.
Read more about relative clause
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