"healthy and perfect seeds only give a good production." justify it.

Explanation:

The good quality seed has high return per unit area as the genetic potentiality of the crop can be fully exploited. Less infestation of land with weed seed/other crop seeds. ... Minimization of seed/seedling rate i.e., fast and uniform emergence of seedling. They are vigorous, free from pests and disease.

answer; /// i believe that one of the causes is (a loss of habitat);