Maximum photosynthesis occurs through .......

Snakes are included under which category in a food chain?

Read the given statements and determine how many of them are correct.
$(1)$ Secondary succession depends on the condition of the soil and the availability of water.
$(2)$ Air,water,and land are abiotic factors of an ecosystem.
$(3)$ The structure of an ecosystem includes the cycling of nutrients and the unidirectional flow of energy.
$(4)$ The primary source of energy in an ecosystem is the sun.

Herbivores are called

In a food chain,humans cannot be placed in which of the following trophic levels?

Ecological succession is a