Final answer:
Citrus trees create their seed through a process called apomixis, which is a method of asexual reproduction.
Step-by-step explanation:
The process of creating seeds in citrus trees through asexual reproduction is called apomixis. Apomixis is a method by which new seeds are formed without fertilization, as the ovule or part of the ovary gives rise to a new seed. This method allows for the production of seeds that are genetically identical to the parent tree.