The most effective visual for a presentation about why people should limit air pollution is: A. factories and power plants spewing air pollution.
A presentation application can be defined as a type of computer application which is designed and developed to avail its end users an ability to create various slides that contains both textual, visual, and multimedia information, which are typically used during a presentation.
Air pollution can be defined as the contamination of an environment or the atmosphere, especially through an emission of poisonous, hazardous, and toxic chemical compounds (substances) by humans and various industries or factories.
In this context, we can reasonably infer and logically deduce that the most effective visual for a presentation about why people should limit air pollution is that factories and power plants spewing air pollution.
Read more on air pollution here: https://brainly.com/question/14390072
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