The correct answer is ozonosphere. Ozonosphere is the sub-layer that protects us from ultraviolet radiation. Ozonosphere or commonly known as ozone layer is plays the role of being the shield of the Earth from the Sun's ultraviolet radiation and absorbs it.
Answer: Yes the answer is true. How ever, you can add a few points like:
Explanation: If nuclear bombs were blown at the end of mars ploes, it could change its weather.(Elon Musk). It is also observed that there is higher oxygen levels in the northern parts of mars.(information from Uae mars probe). So yes you are right but there are /can be a few similarities between earth and mars.

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.
Close to major tectonic plate boundaries
This area is located on a convergent plate boundary where oceanic crust collides with continental crust. Because the oceanic crust is more dense, it sinks into the ground and heats up. It thus becomes a volcano as it rises back to the surface. This process is known as subduction.