Which of the following is a piece of evidence used to support plate tectonics?

• A. Intrusive igneous rocks
• B. The presence of identical fossils on separated continents
• C. The color of soil in deserts
• D. The number of satellites in orbit

Answer: (B)

Evidence that continents move comes from clues like finding identical fossils on lands that are now far apart. When scientists discover the same species fossilized in places such as two opposite sides of the ocean, it suggests those continents were connected long ago, allowing organisms to spread across a single landmass. Over time, the tectonic plates shifted, and the continents drifted apart, leaving behind the same fossils in both places. This kind of fossil match supports the idea that the Earth's crust is broken into moving plates.

Other options don’t relate to how continents move. Intrusive igneous rocks tell us about magma cooling underground, not about the movement of large landmasses. Soil color in deserts reflects weathering and climate, not plate motion. The number of satellites in orbit has to do with space technology, not geology.