It is there in case a circuit may not work or water may have entered the circuit they can reset or cut off the switch to get rid of the water.
The number of producers is greater then the number of consumers , primary consumers is greater then the number of secondary consumers and the secondary consumers is greater then the number of tertiary consumer
Explanation:
Single Crochet Stitch.
Double Crochet Stitch.
Half Double Crochet Stitch.
Treble Crochet Stitch.
Slip Stitch Crochet.
Truth water at the top has energy