Q: The quarks in a particle are confined, meaning individual quarks cannot be what?


Read this paragraph and choose the correct option from the provided answers:

Identify evidence for electroweak unification. The quarks in a particle are confined, meaning individual quarks cannot be directly observed. Are gluons confined as well? Explain.

 Choices:

- separated

- changed

- hypothesized

- directly observed


A:
directly observed