An ecosystem resists changes because it is in a state of .........

In the North East region of India,during the process of jhum cultivation,forests are cleared by burning and left for regrowth after a year of cultivation. How would you explain the regrowth of forest in ecological terms?

Out of the following biogeochemical cycles, which ones are gaseous?
$I.$ Sulphur
$II.$ Phosphorus
$III.$ Nitrogen
$IV.$ Carbon
Choose the correct option.

Which of the following statements is incorrect?

$A$ pond is a.......

In a food chain,a lion is a