Question

1. why are academic essays and scientific reports usually good sources of information?

they have been written by journalists.
they have been peer - reviewed.
they contain a lot of information.
they are usually biased.

Explanation:

• "They have been written by journalists" is incorrect because academic essays and scientific reports are typically written by scholars or researchers, not journalists.
• "They have been peer - reviewed" is correct. Peer - review involves evaluation by experts in the same field, which ensures the quality, accuracy, and validity of the information in academic essays and scientific reports.
• "They contain a lot of information" is not the main reason for them being good sources. Quantity of information does not guarantee quality or reliability.
• "They are usually biased" is incorrect. Academic and scientific work aims for objectivity, and peer - review helps to reduce bias.

Answer:

B. They have been peer - reviewed.