Final answer:
Option D.
Global warming is the result of increased greenhouse gases such as carbon dioxide from human activities including the burning of fossil fuels and deforestation, causing Earth's temperatures to rise.
Step-by-step explanation:
The human impact that is a direct result of carbon emissions from cars, factories, airplanes, and animals is Global warming.
The increase in Earth's temperature is mainly caused by the rise in greenhouse gases such as carbon dioxide.
These greenhouse gases are emitted through various human activities including the burning of fossil fuels in cars and factories, deforestation, and certain agricultural practices.
When fossil fuels like coal, gas, and oil are burned, they release carbon dioxide (CO₂), which traps heat in the Earth's atmosphere, leading to increases in global temperatures.
This process is exacerbated when forests, which are natural carbon sinks that absorb CO₂, are cut down, thus removing a critical component of the Earth's natural system for regulating its climate.