Answer:
Moon I am guessing. Another option is comet, but they normally don't orbit a planet.
Answer:
HCl is the correct answer
Which shows that gastric juice is much more acid than blood.
Answerr:porosity
,because Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%.