Specific conserved places with huge biodiversity or a variety of life forms are known as:

The correct option is C

Biosphere reserves

Biosphere Reserve, a title given by UNESCO, are large areas of protected land for conservation of wildlife, both plant and animal resources and traditional life of the tribals living in the area. They aim to promote management, research and education in ecosystem conservation. This includes the 'sustainable use of natural resources' which means using the resources in a way that it doesn't compromise with the needs of future generation.