Question

word part list
algia
dynia
itis
lith
logist
neuro
osteal
ot
oto
plasty
rrhea
sclerosis
scope
abnormal hardening of the ear

Explanation:

We need to combine word parts from the list to form a term for "abnormal hardening of the ear". "Oto -" means ear (from the word part list), and "sclerosis" means hardening.

Answer:

oto sclerosis