Answer: Usually on a map, solid lines represent boundaries between nations, or if it is a map of the states, it would represent the borders of the states.
Explanation:
Urbanization with increased medical facilities, DTM stage 3.
Answer:
Your backyard is an ecosystem, Producers return nutrients to the soil, and The sun is the primary source of energy in an ecosystem.
Explanation:
this is the most common answers i could find
Extremely hot, forms in mantle, known as lava in surface, contains dissolved gasses
