I believe the correct answer would be : D. Keratin
I hope that this helps you !
Explanation:
Working memory is the part of short-term memory that is concerned with immediate conscious perceptual and linguistic processing.
( I got the answer by typing "What is working memory" on Google. You can look it up yourself to understand better")
It has high melting and boiling point.strong intermolecular forces and polar in nature
Autotrophs make their own food while heterotrophs do not; because of this, autotrophs may survive in certain situations in which heterotrophs would not.
Hope this helps.
