A) rare to find and hard to form because in the passage, it mentions that you need specific conditions but they are hard to find (because they get destroyed before they are discovered)
Answer:
add something
Explanation:
i cant help you unless you give me more info :)
1. equally
2.such as
3.as well as
4.and also
5.similar
6.if you want a strictest sense of phrase, "identical" comes to mind.
