The state of Gujarat has river, desert, forest and lake ecosystems, thus exhibiting a diversity of life. This is an example of ................. diversity.

Alpha diversity is the species diversity in a given community or habitat. It depends on upon species richness and evenness or equitability. 

Beta diversity is biodiversity, which appears in a range of communities due to the replacement of species with the change in community or habitat due to the presence of different microhabitats, niches and differences in environmental conditions. 

Gamma diversity is the diversity present in ranges of communities as represented by the diversity of habitats or ecosystems over a total landscape or geographical area.

Delta diversity is defined as the change in species abundance and composition between areas of gamma diversity which occurs within the area of epsilon diversity.

Thus, the correct answer is option C.