Intestinal muscles and heart muscles are involuntary muscles,hand muscles and neck muscles are voluntary muscles
<span> There are two main methods of determining the salt content of water: Total Dissolved Salts (or Solids) and Electrical Conductivity. Total Dissolved Salts (TDS) is </span>measured<span> by evaporating a known volume of water to dryness, then weighing the solid residue remaining.</span>
IT'S D becuse none of the other awser choses make sense so ya
I'm pretty sure they are reffering to Alzheimers.
