Options:
A). strength
B). strong
C). h2o
D). bushes
E). density
F). wheat
G). firm hugs
H). biceps
Given those answer options, answer the question: Fact 1: Muscle contraction occurs when muscle fibers get shorter. Fact 2: Muscles in the upper arm called biceps are used to flex the arm. Given the two facts above, what contracts when fibers get shorter?
A:
H).