Like you might have studied. Heated hair expands while colder air contracts. So, the sound isn't able to move as efficiently in cold air than it would in warmer air.
Answer:
refrain from using or disposing of (something); retain for future use.
Explanation:
Their constituent particles are different like Glucose of Starch and Fatty acids & Glycerol of Fats..,...
the answer is b herbivores feeding on plants
hope this helps
