Explanation:
En primer lugar, la biodiversidad y los ecosistemas nos brindan servicios esenciales para el bienestar humano. Nos otorga oxígeno, alimento, vestimenta y salud. Asimismo, son importantes para el desarrollo socioeconómico de la sociedad.
The combustion of fossil fuels like coal, petroleum and other factory combustibles is a major cause of air pollution. ... Meanwhile, emissions caused by gasoline-burning vehicles – i.e. CO, CO², nitrogen oxides, particulates and water vapor – are also a significant source of air pollution.
I say Air Pollution
Student 2 because a proton is what identifies a atom and student to is the only one who has that under the list. Plus the valence electron is right as well
A. Geologist → rocks around and under the hot spring
B. ecologist → relationships between organisms and the hot spring
C. sociologist → human behavior around the hot spring
D. meteorologist → atmosphere and weather around the hot spring