Answer:
The outer core is mostly made out of iron.
Explanation:
Answer:
Bangladesh is a country that is flood prone and has ground water contamination.
Explanation:
The ground water contamination is serious threats to the water reserves of bangladesh and is a major public problem. The arsenic contamination wa first identified in the north district of bangladesh since 1993.
- Some recommendations for prevention and conservation of groundwater in Bangladesh.
- Providing safe and hygienic drinking water options
- Involving local government
- Providing proper management of patient thright proper follow up methods.
- Regular monitoring of arsenic
- Encouraging research on groundwater contamination and issuing recommendations of toxicity and management.
Answer:
high productivity ,low per capita output, emphasis on cereal , dependence of soil
Explanation:
more than one crop cultivated during the year
Explanation:
continental collision is a phenomenon of plate tectonics that occurs at convergent boundaries. Continental collision is a variation on the fundamental process of subduction, whereby the subduction zone is destroyed, mountains produced, and two continents sutured together.
Answer:
Option (D)
Explanation:
The seasons are the most important phenomenon that occurs on earth. It occurs due to the tilting of the earth's axis of rotation. This axis of rotation is tilted at an angle of 23.5 degrees, caused due to the collision with another proto-planets in its geological time. The axis of rotation is not related to the occurrence of seasons but only the tilting of this axis is responsible for the seasons. The earth when moves around the sun with its tilt, there forms 4 types of seasons on earth, namely the summer, autumn, winter, and spring respectively.
Hence, the correct answer is option (D).
