For continental U.S. the answer is never. Since the earth's rotation axis is tilted 23.5 degrees with respect to its orbital motion around the su, one would have to be less than 23.5 degrees above or below the equator to have the sun pass direclty overhead
The answer is; C
The study of plant and animal life in an environment is known as ecology. Anthropology is mainly defined as the study of humans, their behaviors and societal norms and values (such as politics, culture, religion, and language), in the past and present.
Similarities:
- Marine and freshwater ecosystems are water, covering almost 75 percent of the earth's surface.
-The most pervasive problem affecting both freshwater and marine ecosystems is pollution.
-The process of regulating the osmotic pressure on fluids inside an organism is essential to all freshwater and marine species.
Differences:
- Marine ecosystems are more diverse than freshwater ones.
- In marine or seawater, the salinity level, or the concentration of salt is greater, but freshwater is not totally void of it.
- Only 1% of the whole water body on the earth is freshwater, the other 99% is marine water.
Note- I couldn't come up with ones for estuaries, sorry.
Answer:
the arctic circle has less population there is little to no recourses for organisims and it is extremely cold.
Economic activities which includes effective trading patterns influence all country's level of development.
Countries such as China, France, United States, Japan are addressed as developed countries with sound economy because of their Modern industrial societies which brought fortunes to their revenue coffers.
There are four type of economic activities:
- Primary activities: its involves the extracting, mining, farming, fishing etc activities.
- Secondary activities: Its involves manufacturing and production of goods such as making cars, steel etc
- Tertiary activities: Its involves providing a service such as teaching, medicine, nursing etc
- Quaternary activities: Its involves research and development industries which aims at improving the other three activities.
Therefore, countries with these effective economic activities will have a developing economic system which will be influential in world.
Learn more about Economic activities here
brainly.com/question/7244467
