Which operations security control prevents unauthorized intruders from internally or externally accessing the system and lowers the amount and impact of unintentional errors that are entering the system?

The correct answer is Preventative controls.

Explanation:

Preventive Controls: Anticipate unwanted events before they happen.

Example: Security software that prevents access to unauthorized personnel, to try to prevent the production of errors or fraudulent events.

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solution:

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to adding   a new row to a table we   have to do process last table cell and pressing tab.

this is the process to add new row in the cell:

* to add a row below the cell, click insert below in the rows and columns group.

thus this is the required right answer.