81. The author implied that:

Answer: A

Explanation:

Nurseries are helpful for farmers.

Nurseries play a crucial role in supporting farmers by providing them with a wide variety of plants, trees, and shrubs that are essential for agriculture and landscaping. This indicates that nurseries are beneficial resources for those involved in farming and gardening.

A) Nurseries are helpful for farmers.

This option is correct as the extract emphasizes that nurseries raise plants in mass quantities, which are sold to farmers. The availability of these plants supports agricultural activities and enhances the productivity of farms.

B) Nurseries are a waste of resources.

This option is incorrect because the extract clearly outlines the function and importance of nurseries in agriculture. It highlights their role in providing essential plants to farmers, which contradicts the notion that they are wasteful.

C) Nurseries are only useful for large-scale commercial operations.

This option is also incorrect. While nurseries do support large-scale operations, they also cater to individual gardeners and smaller-scale farming needs. The extract does not limit the usefulness of nurseries to just commercial entities.

D) Nurseries are unnecessary and rarely used.

This option is incorrect as well. The extract describes nurseries as vital for raising plants that are sold to farmers and gardeners, indicating that they are necessary and actively used in agricultural practices.

Conclusion

The correct answer, that nurseries are helpful for farmers, is definitively supported by the extract's discussion of nurseries as essential sources of plants that contribute to agricultural productivity. All other options fail because they misinterpret the significance and functionality of nurseries within the farming ecosystem.