Answer:
Many European Countries became troubled with a lot of debt
Explanation:
Answer:
2 . Geometry
Explanation:
<u>Egyptians were skilled in the study of geometry which they used for the development of their civilization</u>. The great pyramids they built are the visible and still surviving evidence of their vast knowledge.
<u>For the construction of the pyramids, they had to develop great geometrical precision and follow it so the structures would be precise and developed. </u>Their basis is the square, and all of their sides are exactly the same. <u>The archeological evidence found in Egypt shows that they know the properties and proportions of shaping the pyramids and making them so they would stand. </u><u>This proves their usage of geometry.</u>
Closed ecological systems are ecosystems that do not rely on matter with any part of an outside ecosystem. An example of closed ecosystems are aquarium ecospheres.
