Final answer:
The advantage of head cabbage with its highly compacted leaves is that it provides protection, support, and efficient use of space. An example is kohlrabi, which has a thickened stem that enhances survival and growth.
Step-by-step explanation:
The advantage of head cabbage with its highly compacted leaves over leaf cabbage like kale is that the compacted leaves provide protection and support to the inner parts of the cabbage. This helps to prevent damage from external factors, such as pests and harsh weather conditions. Additionally, the compact structure of the leaves allows for more efficient use of space, enabling more cabbages to be grown in a smaller area.
An example of a cabbage with highly compacted leaves is kohlrabi, which has a thickened stem that is eaten. The thickened stem provides a similar advantage of protection and support to the cabbage.
Overall, the advantage of head cabbage with its compacted leaves is that it enhances the survival and growth of the cabbage plant.