Which is the main energy source for an ecosystem?

Write two characteristic features of energy flow in an ecosystem.

Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called

Suggest one word for each of the following statements/definitions:
$(a)$ The physical and biological world where we live in
$(b)$ Each level of food chain where transfer of energy takes place
$(c)$ The physical factors like temperature,rainfall,wind and soil of an ecosystem
$(d)$ Organisms which depend on the producers either directly or indirectly for food

The green plants capture about $10 \%$ of the energy of sunlight that falls on their leaves and convert it into food energy.

Producers,consumers,and decomposers are which type of components of an ecosystem?