Sustainable Development Goal - 'Life below water' aims at conserving and…

The Sustainable Development Goals (SDGs) are the 17 global goals adopted by UN member states in 2015 as part of the 2030 Agenda for Sustainable Development. Each goal carries an official title and a defined scope stating exactly what it aims to conserve, protect, or achieve.

SDG 14, titled "Life below water", is officially defined as: conserve and sustainably use the oceans, seas and marine resources for sustainable development. This question quotes that official definition directly, so the blank must be completed with the resource domain the goal targets – oceans, seas and marine resources.

Why the other domains belong to different goals:

• Ground water resources fall under SDG 6 (Clean water and sanitation), which covers water supply and freshwater management, not SDG 14's marine focus.

• Rivers, streams, ponds and lake resources are inland freshwater bodies, also within SDG 6's scope rather than SDG 14's ocean mandate.

• Wetland resources are treated as ecosystems under SDG 15 (Life on land) and related conventions, not under the ocean-specific SDG 14.

Since SDG 14 is explicitly scoped to oceans, seas and marine resources, that is the correct completion of the goal's stated aim.