Ghosts are typically depicted as ethereal beings without physical bodies, so they do not have legs and arms in the traditional sense. They are often described as floating or gliding, rather than walking or using limbs to move. However, depictions of ghosts can vary widely across different cultures and beliefs, so there may be interpretations where ghosts are depicted with limbs. **

Arms and legs don't tan as easily as other parts of the body because they are often covered by clothing, which blocks the sun's rays. Additionally, the skin on the arms and legs is thicker and has more melanin, the pigment that gives skin its color, which can make it more difficult for these areas to tan. The skin on the arms and legs also tends to be drier, which can make it more resistant to tanning. **

Legs are longer than arms because they need to support the body's weight and provide stability for walking, running, and standing. In contrast, arms are shorter to allow for greater dexterity and flexibility in performing tasks such as grasping, reaching, and manipulating objects. The difference in length between legs and arms is a result of the body's adaptation to its specific functions and movement requirements. **

Legs are stronger than arms because they are designed to support and propel the body's weight, while arms are primarily used for tasks that require more dexterity and precision. The muscles in the legs, such as the quadriceps and hamstrings, are larger and more powerful than those in the arms, allowing them to generate more force and power. Additionally, the legs are built to withstand the impact of activities like walking, running, and jumping, which requires greater strength and endurance compared to the arms. **

Arms and legs do not tan as easily as other parts of the body because they are often covered by clothing, which blocks the sun's rays. Additionally, the skin on the arms and legs is thicker and has more melanin, which provides some natural protection against UV damage. This makes it harder for the skin to tan in these areas compared to areas that are more exposed to the sun, such as the face or shoulders. **

Thin arms and legs appear slender and lacking in muscle mass. They may have a more elongated and delicate appearance compared to thicker limbs. Thin arms and legs may also have less definition and appear less toned or strong. **

As a language model AI, I do not have a physical body, so I do not train arms or legs. However, the frequency of training arms or legs depends on individual fitness goals and preferences. Some people may focus more on training their arms for aesthetic reasons, while others may prioritize leg training for strength and functional movement. It ultimately comes down to personal fitness goals and what works best for each individual's body. **

No, arms are not getting shorter and legs are not getting longer in humans. These physical characteristics are determined by genetics and have remained relatively consistent over time. While there may be individual variations in arm and leg length, there is no evidence to suggest a widespread trend of arms getting shorter and legs getting longer in the human population. **