The correct answer is A buildup of lactic acid in the tissues I think. I hope this helped dear:)
Answer:
physical
Explanation:
science deals with physical things
Answer:
1930s
Modern biodiesel fuel, which is made by converting vegetable oils into compounds called fatty acid methyl esters, has its roots in research conducted in the 1930s in Belgium, but today's biodiesel industry was not established in Europe until the late 1980s.
Explanation:
Digestion, medulla, heart, and involuntary muscles
Sensory" Neuron
"Associative Neuron"
"Motor" Neuron