Explanation:

- Relative referencing: This style adjusts automatically when a formula is moved or copied to another cell. It's handy for calculations that need to change based on their position.

- Real-time referencing: This isn't a recognized cell referencing style in spreadsheets. Other terms like "relative," "absolute," and "mixed" are used instead.

- Absolute referencing: This style keeps a constant reference to a particular cell, even when copied to other cells. It uses the dollar sign ($) to lock the row or column.

- Mixed referencing: This combines relative and absolute referencing. It locks either the row or the column, but not both.

- Correct Answer: Real-time referencing