How many continents are there on Earth?

The correct choice reflects the widely accepted understanding that there are seven continents on Earth: Africa, Antarctica, Asia, Europe, North America, Australia (or Oceania), and South America. This classification is rooted in both cultural perspectives and scientific delineations of large landmasses.

In geography, the concept of a continent can vary slightly depending on different educational systems and regional perspectives, but the seven-continent model is the most commonly taught worldwide.

While some systems might refer to smaller landmasses or geographical distinctions differently, the seven-continent model remains the standard in most contexts, making this answer the most accurate.