Which music technique is common in madrigals

First to answer will be the brainliest i need the answer asap

What are the two ways in which you can identify forms? cones and spheres are examples of (dark/artifical/geometric) forms, whereas mountains and trees are (natural/organic/light) forms.

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false