Genes of disease resistance and other desirable characters are introduced into plants by using:

Explanation

The correct answer is genetic engineering. This process involves the manipulation of an organism's genome using biotechnology to introduce desirable traits, such as disease resistance, into plants. This method is widely used in agricultural biotechnology to enhance plant characteristics.Cloning simply creates identical copies of an organism and does not introduce new genetic traits. Gene therapy is a technique used for correcting defective genes responsible for disease development, primarily in humans and animals, not plants. The option biological is too broad and does not specify any method related to gene introduction.