Tag: development of landforms

• Rivers carry a large amount of sediments with them. When rivers deposit these deposits near their mouths, before falling into to sea, a landform is formed that is known as delta. It has rich soil and the river in delta gets bifurcated into a number of streams making deltas highly fertile.
• Formation of the delta is influenced by the amount and rate of sedimentation, shape and slope of the coast and also by the waves striking at the coast. Hence all options are correct.

The valley is formed by the rift or faulting. It is a liner shaped low land between several highlands or mountain ranges created by the action of geologic rift or fault. 

4500 meters

With an average elevation exceeding 4,500 meters (14,800 ft), the Tibetan Plateau is sometimes called "the Roof of the World" and is the world's highest and largest plateau, with an area of 2,500,000 square kilometers  (about five times the size of Metropolitan France).

• At one point of time, all the landmass on Earth was united as one mega continent called Pangea and whole water bodies were also unified called Panthalassa.
  
• After that, the Pangea got bifurcated into the northern part as Laurasia and southern part as the Gondwanaland.
• Peninsular India was part of Gondwanaland which moved northwards to unite with rest of India. Thus the right answer is B.

Sudden movements of the earth can be noticed during the eruption of a volcano. Sudden movements, caused by sudden endogenetic forces coming from deep within the earth, cause such sudden and rapid events that these cause massive destruction at and below the earth's surface. These forces work very quickly and their results are seen within minutes.

Mount Kenya is the second highest mountain in Africa, after Kilimanjaro. Mount Kenya is a stratovolcano created approximately 3 million years after the opening of the East African rift. Before glaciation, it was 7,000 m high. It was covered by an ice cap for thousands of years. This has resulted in much eroded slopes and numerous valleys radiating from the centre.

An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant.

An erupting volcano is an active volcano that is having an eruption...

A dormant volcano is an active volcano that is not erupting but supposed to erupt again.

An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.

The above classification is based on the frequency of eruption while the classification as a composite volcano is based on the structure of the volcano thus option C is the right answer.

Mt Vesuvius is a volcano located in Italy which had last recorded eruption in 1944, hence A is the correct answer. It has a long history of a number of eruptions in recorded history thus it is considered as an active volcano.