I think tracheae which is B not sure tho
The promise of jobs and prosperity, among other factors, pulls people to cities. Half of the global population already lives in cities, and by 2050 two-thirds of the world's people are expected to live in urban areas. But in cities two of the most pressing problems facing the world today also come together: poverty and environmental degradation.
You forgot to put the options, but i believe it is magma.
His work, which was documented and repeatable, contradicted the accepted cell theory, so a change in the theory was required.
Answer:
in the blue bubbles bby..
Explanation:
