Answer: I believe it is “There were significant changes in scientific knowledge about planets”
Explanation: Since scientific knowledge has grown about planets, Pluto doesn’t fit some descriptions in order to be classified as one.

Actually Welcome to the Concept of the History.
Environmental Problems, such as Pollution in the river are :
=> The main causes of water pollution in the Ganga river are the disposal of human sewage and animal waste, increasing population density, and disposal of industrial waste into the river.
=> Some of the dams being constructed along the Ganges basin will submerge substantial areas of nearby forest.
Social problems:
1. The Ganga Action plan (GAP) largely ignored public participation despite having funds allocated for it. It is interesting to note, therefore, that the NGRBP has made provisions for public participation although it has not yet outlined how it is to be implemented .
2.Lack of proper discharge of religious offerings.
3.Lack of creation of eco-friendly offerings made to the river.
Answer: This occurs where streams radiate outward from an isolated mountain peak. Most volcanic islands have this pattern.
That is its volume.
Hope this helps :)
There are many reasons some may rent instead of buy a home,
It maybe that there are no homes for sale in the area, yet there is renting available. Or they may want to stay on the move and travel a lot so they will rent for a year at a time in each place.
Hope this helped!! <span />