The answer is skin. hope this helps! :)
Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet
By keeping the care at the highest possible level that you can offer and going above and beyond the job.
C. Eat a high-protein diet
