You just have to go over it over and over until you can memorize it and remember where everything is<span />
I'd say false. Just because the side lengths are the same doesn't mean the angles are too.
You are correct in your assumption. The kind of fossil that has been described in the question is Crystallization. It is also called crystallized fossil. The correct option among all the options that are given in the question is the second option. I hope that this answer has come to your help.
