users input Forms depends on dropdown menu choice

[SignXi2]

Hi

Here is what I'm trying to achieve and  I want the most efficient way you think I can do it :

I have  a table named Activities. That table refers to multiples activities in différents domain so each activity  has its own set of Tasks. What I'm trying to achieve is to create a View where users can select activities in one dropdown menu and then depending on the activity they choose, appsheet will generate a form with labels of tasks only related to it.

Hope you understand my problem and thanks for the Help..