Answer:
C. Principle of original horizontality
Explanation:
The Law of Original Horizontality suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed. This allows us to infer that something must have happened to the rocks to make them tilted.
Answer:
The answer is Option C: Index fossils.
Explanation:
Index fossils are used to identify geologic periods or faunal stages in rock layers. These fossils must have a wide geographic distribution and manifest obvious evolutionary trends to help geologists and others who need this geological data to better understand the time scale and to pinpoint a time period. For example, ammonites were common during the Mesozoic Era, but they were extinct by the Cretaceous period. Geologists would use ammonites to help determine this time frame if present.
Differences between Indus, Nile, and Yellow river valley civilizations are (please refer the attached image)
Learn more about the Indus, Nile, and Yellow valley civilizations here:
brainly.com/question/12821276
Answer:
Correct answer is B. The diffusion of democracy
.
Explanation:
Option B is the correct one as the democratic principles that have developed in this countries have their roots in the Ancient Greece and Rome.
Option A is not correct as this countries fought to prevent the principles of communism.
Option C is also not correct as United States removed monarchy during the Revolution.
Option D is correct as theocracy was never accepted in those countries.
Answer: Oxygen
------
Respiration is the use of oxygen to produce energy. Oxygen, or

, is also created as a by-product of photosynthesis during the light-dependent reactions. The photolysis, or breaking down of water, H2O, during photosynthesis, created oxygen as a by-product.