Brandon left his house this morning without a sweatshirt. he cannot focus on his friend's presentation because he can't stop thinking about how cold he is. this is an example of:

Base on the given scenario, the action of where Brandon can’t focus because he can’t stop thinking how cold he is, is an example of physical noise. Physical noise is being defined as a way of having to distract a person from acquiring the message or information because of the external factors that affects it.