Earth's cycle moves water from one reservoir to another. this cycling of materials is one of earth's dynamic processes.
tectonic
rock
hydrologic
carbon

The answer that is most suitable is earth's hydrologic cycle.

Water does not remain locked up in the oceans,  icecaps, groundwater systems , or the atmosphere. Instead water is continually moving from one reservoir to another. This movement of water is called the hydrologic cycle.

Although water in the hydrologic cycle is constantly in motion, it never leaves the earth. The earth is nearly a "closed system" like a terrarium. This means the earth neither gains nor loses much matter, including water.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.