Meaning: 'Overwhelmed' means feeling unable to cope due to excessive information or emotions, indicating a sense of being overpowered.

Wrong options:

• overestimated: 'Overestimated' means to have a higher opinion of something than is warranted, which does not fit the context of feeling inundated by information.
• overconfident: 'Overconfident' refers to having excessive confidence, which is unrelated to the feeling of being overloaded with information.
• overgrazed: 'Overgrazed' pertains to land that has been excessively grazed by animals, which is irrelevant in this context.

Correct answer: including

Explanation: The word 'including' serves as a preposition that introduces examples of processes or concepts, fitting grammatically and contextually as it indicates what is part of the message.

Meaning: 'Including' means to contain as part of a whole, suggesting that the message encompasses unfamiliar information.

Wrong options:

• includes: 'Includes' is a verb form that does not fit the grammatical structure required here, as the sentence needs a preposition to introduce examples.
• included: 'Included' is the past participle form, which does not fit the present context of describing ongoing processes in the message.
• inclusion: 'Inclusion' is a noun that does not grammatically fit in the sentence structure where a verb or preposition is needed.

Correct answer: palatable

Explanation: The word 'palatable' is an adjective that describes something that is acceptable or agreeable, fitting well in the context of making information easier to digest.

Meaning: 'Palatable' means pleasant to taste or acceptable, indicating that the information should be presented in a way that is easy for the receiver to handle.

Wrong options:

• discreditable: 'Discreditable' means likely to harm someone's reputation, which does not fit the context of making information easier to understand.
• unaccountable: 'Unaccountable' refers to being unable to be explained or justified, which is contrary to the idea of making information digestible.
• unprofitable: 'Unprofitable' means not yielding profit or benefit, which does not relate to the context of presenting information.

Correct answer: primary

Explanation: The word 'primary' is an adjective that indicates the main or most important responsibility, fitting grammatically and contextually in the sentence.

Meaning: 'Primary' means first in importance or order, highlighting the sender's main responsibility in communication.

Wrong options:

• primate: 'Primate' refers to a type of mammal, which is irrelevant in the context of responsibility in communication.
• customary: 'Customary' means usual or traditional, which does not convey the sense of primary importance needed here.
• summary: 'Summary' refers to a brief statement of the main points, which does not fit the context of indicating responsibility.

Correct answer: adjust

Explanation: The word 'adjust' is a verb that means to change or modify something to fit a new condition, which fits grammatically and contextually in the sentence about modifying a message.

Meaning: 'Adjust' means to alter or adapt something to achieve a desired fit or outcome, indicating the need for flexibility in communication.

Wrong options:

• locust: 'Locust' refers to a type of insect, which is completely unrelated to the context of modifying a message.
• thrust: 'Thrust' means to push or drive with force, which does not fit the context of making changes to a message.
• unjust: 'Unjust' means not based on or behaving according to what is morally right and fair, which does not relate to the act of modifying communication.