How to do cascading selects in ODK Build

Hi, @Souirji_Abdelghani and @yanokwa

My name is John Wambua. I had a different question kindly assist. suppose I have this question: How many crops do you plant in your farm and the choices are (Maize, beans and sorghum) and the farmer responds (beans and maize)
and another question asks the farmer which bean and maize varieties do you plant? bean varieties = KATB1, KAT 69 and Nyota while Maize varieties = Pioneer, KDV and KCB. How do I enter this in odkbuild or xlsform? I have seen you have mostly illustrated single choice selection.
agroecology.xlsx (12.1 KB) agroecology.xml (15.3 KB)