Answer:
d. Bacteria
Explanation:
Nitrogen fixation is mostly done by bacteria living in the soil. Plants need nitrogen to grow, but they cannot use it straight from the atmosphere or as ammonia from the soil.
True Huand He is other name for The Yellow River
Answer:
Lithospheric plates are part of a planetary scale thermal convection system. The energy source for plate tectonics is Earth's internal heat while the forces moving the plates are the “ridge push” and “slab pull” gravity forces. It was once thought that mantle convection could drive plate motions.
Explanation:
affects different people in different ways. Most infected people will develop mild to moderate illness and recover without hospitalization.