Keystone species deserve protection because these

$A$ biosphere reserve is legally protected,and no human activity is allowed in its core area. What is this area called?

The Earth Summit was held in Rio de Janeiro in $1992$,which resulted in:

Identify the sacred groves found in India from the following list.
$i$. Khasi and Jaintia Hills in Meghalaya.
$ii$. Western Ghat regions of Maharashtra.
$iii$. Aravalli Hills of Rajasthan.
$iv$. Chanda and Sarguja areas of Madhya Pradesh.
$v$. Ladakh region of Himalayas.
Choose the correct option from given below.

The Red List contains data or information on which of the following?

$A$: Biosphere reserves are also included under the ex-situ conservation strategies.
$R$: Cropping and grazing are allowed in the transition zone of biosphere reserve.