At which trophic level are carnivorous plants included?

The importance of an ecosystem lies in its function of:

Observe the given chart and identify what it represents.

Consider the following statements about food chain:
$I.$ The transfer of energy from producers to top consumers through a series of organisms is called a food chain.
$II.$ $A$ food chain is always straight and proceeds in a progressive straight line.
$III.$ In a food chain,there is a unidirectional flow of energy from the sun to producers and subsequently to a series of different types of consumers.
Which of the statements given above are correct?

Which cycle is represented by the given figure?

The hydrological cycle comprises two overlapping cycles.