Final answer:
The heart would most be at risk if someone had a structural abnormality in the thoracic cage, as the cage is designed to protect it along with the lungs.
Correct option is d) Lungs
Step-by-step explanation:
If someone has a structural abnormality in the thoracic cage, particularly affecting the ribs or the chest wall, the lungs would be most at risk. The thoracic cage, including the ribs and sternum, provides structural support and protection for the organs within the chest cavity, including the lungs. Any deformity or abnormality in the thoracic cage can potentially impact lung function, leading to respiratory issues and decreased lung capacity.
The heart is also protected by the thoracic cage, but lung function is more directly affected by changes in the chest wall or ribcage structure. The liver and kidneys, being abdominal organs, are not directly within the thoracic cage and are, therefore, less likely to be affected by abnormalities in this region.