Final answer:
The cultural variable relevant to the acceptance of mistakes at Lightspeed is tolerance of risk, which fosters an innovative environment.
Step-by-step explanation:
The cultural variable that relates to the acceptance of mistakes at Lightspeed is tolerance of risk. In Edwin Lee's team, the culture of treating mistakes as learning opportunities is indicative of a company that values innovation and understands that risk-taking is an essential part of the creative process.
This approach resonates with the concept that diverse teams, which are encouraged to suggest even the most "off-the-wall" solutions and learn from errors without fear of criticism, can foster an environment where innovation thrives despite organizational challenges such as bureaucracy and centralized decision-making.