Which term is used to define the outline of a shape?

What is the definition of digital literacy?

Which is a characteristic of free and open-source software licenses? a. the source code is unavailable to everyone b. the source code is available only to the government c. the source code is available to all users d. the source code is constantly modified

Which email writing etiquette should ariel follow to let people know that she received their message? a. reply to their messages immediately b. use formal language c. specify the email's intent in the subject field d. be direct when writing the reply