Answer : The correct answer for the blank is -
Producing spores.
Fungi is a separate kingdom of multicellular eukaryotic organisms that are different from plants and animals.
By asexual reproduction, they produce large number of genetically identical, haploid reproductive cells, called spores.
Spores are spread through wind and under favourable conditions, they germinate to form new fungi.
Thus, producing spores is the right answer.