Question

spot the error = nature whisper and command.

Answer 1

Nature whispers and commands

Answer 2

The errors is in the verbs. "Nature" is a noun, and therefore a third person singular number. The use of 's should be added to the verbs describing the function of the third person singular number.

So, "Nature whisper and command" is wrong grammatically. It should be, "Nature whispers and commands". Here nature is personified so the use of capital N should be there too.