Final answer:
An echo chamber refers to an environment in which a person encounters only beliefs or opinions that reinforce their own views.
Step-by-step explanation:
The correct answer is d. echo chamber.
An echo chamber refers to an environment in which a person encounters only beliefs or opinions that reinforce their own views. It can often happen on social media platforms, where algorithms steer people towards content that aligns with their existing beliefs and predispositions, further strengthening their biases.
For example, if a person only follows accounts or pages that share their political views, they will be exposed to a constant stream of content that supports and reinforces their opinions, while ignoring information that challenges or contradicts their beliefs.