Complex sentence: The "Veneto" period was fairly prosperous for regions of Garda Lake; main activities in tremosine were agriculture (olive trees, grape-vine and fruit) and farming (goats, cows, donkeys).
Split into simpler sentences: The "Veneto" period was fairly prosperous for the regions of Lake Garda. The main activities in Tremosine were agriculture (olive trees, grapevines and fruit) and farming (goats, cows and donkeys).