What are three ways that your body builds immunity?

Eat lean protein at every meal, Take a 10-minute walk a few times a day, Shoot for 5 cups of fruits and veggies a day,  Get your vitamin D levels checked, Cook with olive and canola oils, Limit your drinks. I hope 7 is better. 

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.

Idk just need points