What is the simple subject in the sentence: by studying human genes, scientists hopeto learn more about how to prevent and cure hereditary diseases

the one that is a simple subject from the sentence above is : D. Genes

Simple subject is the main word in a group of words that basically tell what the sentence is all about. We can all agree that that sentence is talking about genes

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first aid for seizures is aimed at keeping the person safe until the seizure stops on its own. stay calm, loosen anything around the person's neck, do not restrain them or put anything in their mouth, clear the area around them, and stay with them after the seizure stops.

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