using coal to generate electricity discovering a new species of snake developing an antibiotic to treat infections changing the definition of the term planet
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In science, old ideas can be changed when new discoveries alter existing information. Which situation is most likely an example of a rethinking of an existing idea?
Possibilities:
- using coal to generate electricity
- discovering a new species of snake
- developing an antibiotic to treat infections
- changing the definition of the term planet

changing the definition of the term planet