Final answer:
The explanatory thesis among the options is that crops grown using organic farming methods are more environmentally sustainable than those grown conventionally.
Step-by-step explanation:
The explanatory thesis among the given options is: Crops that are grown using organic farming methods are more environmentally sustainable than those grown conventionally.
This thesis statement presents an explanation of the benefits of organic farming methods. It states that crops grown using organic farming methods are more environmentally sustainable compared to those grown conventionally. The thesis provides a specific claim, stating the superiority of organic farming methods in terms of environmental sustainability.