Libraries run by charitable trusts are an example of:

Not for profit organisation

The correct answer is option 2- Not for profit organisation.

Libraries run by charitable trusts is example of nonprofit organizations. Nonprofit organizations, including those run by charitable trusts, operate for purposes other than making a profit. Instead, they aim to serve a charitable, educational, religious, or other socially beneficial purpose. In the case of libraries run by charitable trusts, their primary goal is often to provide access to information, education, and literacy resources to the community they serve, rather than generating profit for owners or shareholders.