1. A- the economy faced serious challenges
2. B- Modernized
Answer:
A- It is a required subject in evry school
B-agriculture
Explanation:
Four major parts of Earth work together as a complex system: rocks, water, air, and life.
The four parts are called the geosphere,hydrosphere<span>, </span>atmosphere, and biosphere.
Rocks- Geosphere
Water- Hydrosphere
Air- Atmosphere
Life- Bioshpere
Hope This Helps!! :)
Surface temperature of the star affects the color
Explanation:
Air pressure
Measured using a tool called anemometer which looks like a wind vane.
