3.Natural factors that affect Earth's climate include: A. Volcanoes, sun's energy output, El Nino

B. Lightning, forest fires, and wind

C. Earthquakes and the drilling for natural resources

D. Day to day changes in weather

The earth's climate is influenced and changed through natural causes like volcanic eruptions, ocean currents, the Earth's orbital changes, solar variations and internal variability. is short-term cooling. Volcanic eruptions pump out clouds of dust and ash, which block out some sunlight.

answer; native americans who sometimes actively impeded railroad construction; physical obstacles like rivers and canyons, and