I would say a lot of energy
<span>The range of human hearing is generally considered to be 20 Hz to 20 kHz, but it is far more sensitive to sounds between 1 kHz and 4 kHz. For example, listeners can detect sounds as low as 0 dB SPL at 3 kHz, but require 40 dB SPL at 100 hertz (an amplitude increase of 100).</span>
Answer:
He identified that diseases are caused by malfunctioning cells.
That all cells arise from pre-existing cells.
with this option given I don't think there is an odd one
