Which act further devolved powers to Scotland?

The Scotland Act 2016 is the correct choice as it significantly enhanced the powers of the Scottish Parliament. This act followed the 2014 referendum on Scottish independence, where a significant portion of the population expressed a desire for more autonomy. In response, the UK Parliament extended devolved powers in various areas, including taxation and welfare, allowing the Scottish Parliament to have more control over its budget and policies.

This act included provisions for giving the Scottish Parliament greater powers over areas such as income tax, enabling Scotland to set its own rates and bands for personal income tax. Additionally, it transferred powers over certain aspects of welfare and responsibilities related to devolved areas, further solidifying the principle of devolution by allowing for a more tailored approach to governance in Scotland.

The other options represent different aspects of Scottish governance and devolution but do not relate as specifically to the further devolution of powers like the Scotland Act 2016 does.