Has provided the ability to regrow tissue for knee or hip joints.

Biotechnology is the correct option.

Explanation:

Through the techniques of biotechnology, it has become very easy to clone a cell or a tissue. There are various methods which can be used for cloning purpose.

Tissue from a knee or hip joint can be taken and grown in an artificial medium. When cloned tissues are formed, they can be inserted into the genome of the organism.

Not only cells or tissues, now it has been also been able to make organs like artificial heart through biotechnology.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.