Abiotic components refers to
Non-living physico-chemical factors
Living physico-chemical factors
Gases produced by industries
Living organisms
Ecosystem involves
In an ecosystem which of the following are important components
$A$ : Agriculture and aquacultures are man maintained ecosystems.
$R$ : All biotic and abiotic factors are managed by humans in these ecosystems.
Stratification is more pronounced in
The two components of an ecosystem are