Identify which do not belong to the group? bronchi, heart, trachea *
Trachea
Heart
Brochi

alveoli, bronchi, epiglottis *
Alveoli
Bronchi
epiglottis

aorta, ventricle, plasma, atrium *
Aorta
Ventricle
Plasma
Atrium

coronary, mitral, tricuspid, aortic
Coronary
Mitral
Tricuspid
Aortic

alveoli, artery, capillary *
Alveoli
Artery
Capillary

bronchi

epiglottis

plasma

Mittal

alveoli

1.heart (bronchi connected to the trachea / bring oxygen to lungs)

2.epiglottis

3.plasma

4.coronary (not sure bout this)

5.alveoli

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.