Skin is used for protecting the body from harmful substances.
Skin is the body's largest organ.
The body's largest organ protects the body from harmful substances.
What can protect the body from harmful substances?

[a] the body's largest organ
[b] layers of fat
[c] Electric devices
[d] bones
[e] sunburns
[f] hard outer covering
[g] deoxyribonucleic acid
[h] muscle