Cual es esta? La verdad es de astronomía pero no me da la opción

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Each hereditary trait corresponds to