A large variety of plants like banana, rose and sugarcane are grown with vegetative means. Give reasons

I have grown a few wheat plants in my garden along with other plants because I like the plants. Am I growing a wheat crop? Give reasons.

Liverworts and mosses are amphibians of plant kingdom. Give reasons.

A Classification based on vegetative characters of plants is not easily accepted by the taxonomists. Give reason.

Plants require less amount of energy. Give reason.