I think it's better to have multiple folders because for say you have 6 school subjects but only have 1 folder how are you going to keep track with all 6 subjects in one folder ? You could use each folder for each subject which would save you a lot of time when it comes to getting out your complete work .You can have one folder such as "Workspace" and have multiple different sub-folders that relate that to "Workspace". Also if you store pictures in a folder, it might be a good idea to separate them into different sub-folders.
Use a code validation tool.
Answer:
Pulling related code together in objects is Arrays
Helps programmers when they revisit code or are new to code-- Documentation
Explanation:
This is all I know
Answer:
To protect a formula
Explanation:
One common example to apply cell protection to spreadsheet entries is to protect a formula used in the sheet to calculate payouts or rankings for example. A manager might want to share the results of the team to all its team and provides some ranking or other form of calculations in the sheet. He then needs to protect the formula so it's not altered by the team members or anyone else reviewing the file.