What causes blood ph to drop in actively metabolizing/respiring tissues?

When a tissue's metabolic rate increases, so does its carbon dioxide waste production. When released into the bloodstream, carbon dioxide forms bicarbonate and protons through the following reaction: ... These waste products lower the pH of the blood, which increases oxygen delivery to the active muscles.

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

the answer to your question is:

c. complementary base-pairing