Question

the practice of regulating water use and investing in efficient technologies is part of.

Explanation:

Regulating water use and investing in efficient water - related technologies is a key part of water conservation. Water conservation aims to manage water resources in a sustainable way, which includes measures like regulating how water is used (e.g., in agriculture, industry, or households) and investing in technologies that use water more efficiently (such as drip irrigation systems, water - efficient appliances).

Answer:

water conservation