Visual aid is the assistance by an instructional device used to appeal to the vision. A chart representing the effects of chemicals is the most effective aid.
<h3>What is a multimedia presentation?</h3>
A multimedia presentation is the representation of ideas, thoughts, and topics in a visually appealing format. It can be used to depict the effects on lives.
The chart depicting the harmful effects of the chemical-based standard farming with organic farming best explains the visual aid.
Therefore, option B. chart representing harmful effects of chemicals is the most effective visual aid.
Learn more about visual aid here:
brainly.com/question/4409123
"Strange Case of Dr Jekyll and Mr Hyde" was written by Robert Louis Stevenson and tells the story of a scientist named Dr Jekyll, a respected man in society, kind and highly valued in his field of work, where everyone recognizes him as a citizen and an exemplary professional. However, he begins to have curiosities about his second nature, one that nobody knows and that is the opposite of him. At that moment, he begins to do a series of controversial and dark experiments to reveal this second nature. These experiments use unconventional methods that address the dark side of science. The narrative presents us with the duality of human nature and the complexities between the limits of science and ethics.
What book is it? Or is it in history?
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It means stick,attach or fasten something
I think it may be atmosphere.