Over fishing of (blank)
led to nations coming together in the early twentieth century to prevent the extinction on these marine creatures.

This is probably either whales or sharks as both have been over fished in the recent past by many countries in Asia and northern Europe

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.

Closing a ring restricts the rotation around individual car bon carbon bonds hope it will you !