36. Luigi just came home from a tough football practice. He worked extremely hard and was out of breath on several occasions. The next day, Luigi's legs are tired and sore. Why?

check for the pregnancy rating of drug. if its class c or d see if other alternatives

answercells,tissues,organs,organ,system-organism;

levels of biological organization; organism,population,community,ecosystem,biome,biosphere,

hope this .good luck