Explanation:

- Option 1: Reduction - This refers to decreasing something in size or amount. In the context of landscaping, it doesn't fit well as a synonym or related concept.

- Option 2: Restoration - This means to bring something back or restore it to a better or original state. Landscaping can involve restoring land or gardens, making this option somewhat relevant.

- Option 3: Removing topsoil - This is a specific activity in land preparation and not a synonym for landscaping itself. It involves stripping away the surface level of soil.

- Option 4: Restore - Closely tied to restoration, this means to repair or renew something, often related to landscaping when improving land features.

- Correct Answer: Option 2: Restoration - Landscaping often involves restoring or improving land, matching this option.