Question

Give reason.
1. Why are forests considered as a self-sustaining ecosystems?
2. Why MCB or electric fuses are not used in a circuit containing electric cells?​

Answer 1

Answer:

1)The soil of forests gets naturally replenished by the decomposition of dead organic matter. ... In this way, the nutrients are returned to the soil and are again used by plants and trees to develop food for animals. A forest is hence said to be self - sustaining

2)Electrical cell does not cause the flow of electricity with high voltage. MCBs are used in the circuit with the high voltage of electricity. Hence, MCBs are not used in the electrical cells or battery.