In an ecosystem, 1 cycling of energy and nutrients is a coupled process. 2 cycling of energy is an independent process. 3 movement of energy is unidirectional. 4 both macro and micro consumers are necessary. Choose the correct option for statement/s which complete/s the above statement.

Step-by-step solution

In an ecosystem cycling of energy and nutrient is a coupled process, which occurs simultaneously. Movement of energy is always unidirectional and occurs from producers to consumers. An ecosystem may function without macroconsumer but producer and microconsumer or decomposers are necessary for its functioning.