Answer:
i think its because if one of the models are broken or wrong they have a back up or just try to get better info then the others or just to get extra data.
Explanation:
A nervous person is someone who gets awkward easily around people, they tend to stay quiet and to their self. they don’t speak very often, they are probably staring around or not even looking at anyone at all. these type of people aren’t necessarily socially awkward they just get weird around new people or people they don’t feel entirely comfortable with.
D.Cause and Effect because it’s “as a result”, “due to”, “because”, and “therefore”