<span> Do not allow solids to drop into the </span>Bunsen burner<span> to clog the gas jet or the a </span>Bunsen burner<span>. Type of flame. Gas tap. Air hole. </span>
Answer: A high-pitched, singsongy vocalization means that an animal is non-threatening, peaceful or empathetic. Dogs even employ a higher pitch with us when they're trying to get the same message across, like when they whine when they see their owner.
Explanation: