I guess the answer in the blank is Column Heading.
A column letter above the grid, also called the column heading, identifies each column.
The header is not a main part of the email.
Answer:
1.45638
Explanation:
p please mark me as brainlest
Answer: Something people can change and share. It is usually given the bad name of have a bunch of fake information and bugs. Wikipedia is a good example of an open source website but it is not a program.
Explanation: An open source program is a program where you have free rein to basically do whatever you want to it.
Answer: "hierarchy" .
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