Pollination is the process in which pollen is carried to the stigma of flowers.
Pollination is of two types.
(i) Self pollination
(ii) Cross pollination
Geitonogamy is a type of self-pollination, in this pollination occurs between two flowers of the same plant.
As geitonogamy is self-pollination it will lead to inbreeding depression.
Xenogamy is cross-pollination, in this pollination occurs between flowers of two plants.
It brings variations.
Final Answer- So geitonogamy refers to self-pollination and xenogamy refers to cross-pollination,
Geitonogamy leads to inbreeding depression as it is genetically self-pollination.