The answer is the second and third answers. Kingdom Protista is a polyphyletic taxon, meaning they did not evolve from one common ancestor, unlike what you see from a monophyletic taxon. Because they come from multiple ancestors, they share more similarities with other organisms from other kingdoms, rather than themselves.
Answer:
pericardium is outer covering layer of heart. pericardium is double layered membrane.
Explanation:
It's the built up pressure and heat inside the mantle of the earth