The "L" in S-U-R-V-I-V-A-L stands for _______.

The correct answer, highlighted as "Live by your wits," emphasizes the importance of using one’s intelligence, creativity, and problem-solving skills in survival situations. This concept is fundamental in survival training, as it encourages individuals to rely on their instincts and resourcefulness when faced with adversity. Whether it involves finding food and water, navigating through difficult terrain, or improvising tools from the environment, being able to think critically and adapt to changing circumstances can significantly increase one's chances of survival.

The other options, while they may resonate with themes related to life and survival, do not capture the actionable mindset that "Live by your wits" embodies. Each of those phrases reflects a different aspect or philosophy of life but does not imply the direct application of ingenuity and practical skills crucial for overcoming emergency situations. Thus, the focus on ingenuity in the correct answer makes it the best choice to represent the concept within the context of survival.