The answer would be A. This is because swiftlier is not a word and most swiftly is the wrong context for this sentence.
Answer:
Wildfires and Climate Change. Climate change has been a key factor in increasing the risk and extent of wildfires in the Western United States. Wildfire risk depends on a number of factors, including temperature, soil moisture, and the presence of trees, shrubs, and other potential fuels. All these factors have strong direct or indirect ties to climate variability and climate change.
Explanation:
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Answer:
Science fiction assumes that the universe bursts with life, but scientists aren't so sure.
Explanation:
According to the given paragraph about the low probability of finding life in other planets or galaxies, the most effective topic sentence for the paragraph is Science fiction assumes that the universe bursts with life, but scientists aren't so sure.
This is because, a topic sentence is a brief statement of the main point of an essay.