The correct options are
A It has high degree of branching
B It has low density
C It is made using the free-radical mechanism
D It is used to make plastic bags.
LDPE stands for low-density polyethene.
It has low density because of a high degree of branching. The high branching makes it stack less and leads to lower density.
As a result, LDPE is translucent and has low tensile strength. It is made using the free-radical mechanism of polymerisation.
It is used to make plastic bags.