Answer:
The correct answer is option 3) "Increase in size of each vertebra".
Explanation:
Camels have adapted to live in desert conditions by developing distinctive physical characteristics. One of them is to have a long neck that enable them to reach water or food that is up to three meters above the ground. Camels have developed its long neck by having an increased size of each vertebra. Actually, camels have vertebra that is stout, large and less constricted than the average vertebra in mammals.
