Answer: B// erratic
The author describes his cousins behavior as erratic
All shapes can be classified into tow types, name and define them.
Geometric and free form shapes.
Geometric shapes are precise shapes that can be described using mathematical formulas.
Free form shapes irregular and uneven.<span />
The answer would be cooperation this may not be the answer just so I know but i hope this helps
Études are composed of three sets of studies for solo piano, with 27 pieces in total.