Which term is an opening in Earth's surface?

Which term is an opening in Earth's surface?

• A. Infectious Disease
• B. Amoebas
• C. Algae
• D. Volcano

Answer: (D)

Opening in Earth's surface means a place where magma, gas, and volcanic material escape from inside the planet. A volcano is the feature that forms around that passage, with a vent or crater at the surface that serves as the actual opening for eruptions. So a volcano describes a structure connected to that opening, making it the best match for the term in the question. The other options are not openings in the ground—they’re a disease, and two kinds of organisms—so they don’t fit as geological openings.

Opening in Earth's surface means a place where magma, gas, and volcanic material escape from inside the planet. A volcano is the feature that forms around that passage, with a vent or crater at the surface that serves as the actual opening for eruptions. So a volcano describes a structure connected to that opening, making it the best match for the term in the question. The other options are not openings in the ground—they’re a disease, and two kinds of organisms—so they don’t fit as geological openings.