Based on the whimsical nature of the objects described in the image, it's a bit challenging to determine the shortest lifespan as they are not typical living organisms. However, if we consider the objects metaphorically, the burger-shaped car might represent a food item, which typically has a shorter lifespan due to its perishable nature. In contrast, vehicles and cameras usually have longer lifespans as they are non-perishable goods. So, in the context of the CAPTCHA, you might consider selecting the burger-shaped car as the object with the shortest lifespan. Remember, CAPTCHAs can be subjective, and the correct answer may vary depending on the specific logic programmed into the test.