Which process requires an "input" of energy?¿Qué proceso requiere un "aporte" de energía? aprecipitation bdeep water cevaporation dcarbon burial

To determine which of the listed processes requires an "input" of energy, we need to analyze each option:

1. Precipitation: This is a natural process where water vapor condenses into liquid water, forming clouds and eventually falling as rain, snow, or other forms. This process does not require an external input of energy since it's driven by the cooling of the air, not a direct energy input.

2. Deep Water Circulation: Also known as thermohaline circulation, this process is driven by temperature and salinity differences in ocean water. While energy from wind and other factors can influence surface currents, the deep water movement itself is largely a result of natural processes and does not require a significant energy input.

3. Evaporation: This process involves the conversion of liquid water into vapor, requiring energy (usually from the sun) to break the molecular bonds. Thus, evaporation is an endothermic process requiring an input of energy.

4. Carbon Burial: This refers to the process where carbon compounds are trapped in sediments and eventually buried over geological time. This process is more about the storage of carbon rather than requiring an energy input; it occurs due to sedimentation and geological activity.

Conclusion

The correct answer is c. evaporation, as it requires an input of energy to convert water from a liquid to a gas state.