Question

match each business message to the best delivery method.
we are writing to thank you for providing the support we needed to meet our delivery targets last week.
listen up: the big shoe store is announcing a storewide clearance sale!
all employees must obey these updated company internet usage policies.
follow us to learn more about our scuba diving classes for beginning and advanced divers!
letter
memo
social media
radio

Explanation:

Step1: Analyze "letter" use

A letter is formal for gratitude. The message "We are writing to thank you for providing the support we needed to meet our delivery targets last week." fits a letter.

Step2: Analyze "memo" use

A memo is for internal company policies. "All employees must obey these updated company Internet usage policies." is a memo - worthy message.

Step3: Analyze "social media" use

Social media is for promoting services. "Follow us to learn more about our scuba diving classes for beginning and advanced divers!" suits social media.

Step4: Analyze "radio" use

Radio is for public announcements like sales. "Listen up: The Big Shoe store is announcing a storewide clearance sale!" is a radio - appropriate message.

Answer:

letter → We are writing to thank you for providing the support we needed to meet our delivery targets last week.
memo → All employees must obey these updated company Internet usage policies.
social media → Follow us to learn more about our scuba diving classes for beginning and advanced divers!
radio → Listen up: The Big Shoe store is announcing a storewide clearance sale!