Why is it difficult to pull out the husk (fiber like thing on its covering) of a coconut tree?

The husk of the coconut is made up of the sclerenchyma tissue which comprises of  dead cells with thickened cell walls due to deposition of  hemicellulose and lignin. This makes husk of coconut hard and stiff. That is why the husk of coconut is difficult to remove.

@mahalakshmi.r.... Good Try. Keep posting