Megadiverse means a lot of biodiversity. Mega = a lot
Diversity = variation
Answer
Mountain building caused by a Convergent plate boundary between the colliding Indian and the Eurasian plates.
Explanation:
The country of India is located on the Indian Plate and is currently colliding with the Eurasian plate which is creating the Himalayan Mountain Range along with other structural geologic formations.
Convergent Plate Boundary's are the result of two plates colliding with each other this could be oceanic-continental, oceanic-oceanic, and continental-continental. The Indian and Eurasian plates are both continental, there is no subduction between the two plates so no volcanism is present in the area.
(On maps the Indo-Australian Plate is sometimes combined with the Indian Plate but they are widely considered separate).
The correct answer is - a. having differences.
The term heterogeneous is a term used to describe something that is different, that is not the same, or that there's multiple different things. This term can be used for various different things, including human societies, geography, biodiversity, etc.
In the human society, heterogeneous, is used as term when there's societies where multiple different ethnic groups live in a same area, or different racial groups, it may also be used in a manner of representation of the sexes in a particular filed or job, even the architecture and the infrastructure.
It would be harder for us to identify all the different types of animals that lived long ago.