I say Child because he is the one that is frightened.
Sometimes, sunset can be viewed as "romantic". If the author wants to build a relationship the sunset is used as a pathetic fallacy (when the weather matches the mood). The sunset refers to love which will overall build their relationship.
Did u read a article about the climate change PEOPLE ALSO SEARCH FOR
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DescriptionClimate change includes both the global warming driven by human emissions of greenhouse gases, and the resulting large-scale shifts in weather patterns.