Fasiculated roots for food storage and vegetative propagation are found in
Fasciculated roots is a modified adventitious root.
These roots are either swollen or they form root tubers in clusters.
Eg- Dahlia and Asparagus.
In Dahlia, these swollen roots lie at the base of the stem whereas, in Asparagus the swollen roots occur at intervals on the roots.
So, the correct answer is 'Dahlia'.