Describe various methods used in 'In situ conservation'.

(N/A) In situ conservation,also known as 'on-site conservation',involves protecting species within their natural habitats. The primary methods include:
$1$. National Parks: These are strictly protected areas where human activities like grazing,cultivation,and forestry are prohibited to preserve the ecosystem.
$2$. Wildlife Sanctuaries: These areas allow limited human activities such as harvesting of timber or collection of minor forest products,provided they do not interfere with the conservation of wildlife.
$3$. Biosphere Reserves: These are large,multi-purpose protected areas designed to conserve biodiversity while promoting sustainable development. They are divided into three zones: the core zone (no human activity),the buffer zone (limited research and education),and the transition zone (human settlements and sustainable resource use).
$4$. Sacred Groves: These are forest patches protected by local communities based on cultural or religious beliefs,serving as a refuge for rare and threatened plant and animal species.