Option 1: Conservation of forests and plantation:

This option is not the correct description of tissue culture. Tissue culture does not involve conservation of forests or plantation activities. It is a specific technique used for the growth and propagation of plant tissues.

Option 2: Growth and propagation of horticultural crops:

This option is partly correct. Tissue culture does involve the growth and propagation of plant tissues, including horticultural crops. However, it is not limited to horticultural crops only, as it can be applied to various plants for agricultural and research purposes.

Option 3: Science of cultivating animal tissue in an artificial medium:

This option is the correct description of tissue culture. Tissue culture involves cultivating and growing animal tissues in an artificial medium, usually in a laboratory setting. It is used for various purposes such as studying cell behavior, drug testing, and producing cells for research or medical purposes.

Option 4: Protection of wild animals:

This option is not the correct description of tissue culture. Tissue culture does not involve any activities related to the protection of wild animals. It is solely focused on the cultivation and growth of animal or plant tissues in an artificial environment.

In conclusion, option 3 is the correct description of tissue culture, involving the cultivation of