Whistleblower refers to Someone from within an organization who informs about the shady/unethical activities that the organization was doing to people outside of the organization. (Roger revealed that some part of the equipment made by his organization was malfunctioning)
In united states, whistle blower is legally required to be given a certain level of protection depending on how much danger the whistlers put themselves in by revealing the information.
Suzie's explanation is correct because magma flows through cracks between faults and this can result in the creation of volcanoes. Johnny's statement causes trenches which could lead to magma flow but not volcanoes.
