Answer:
prokaryotes
Explanation:
Prokaryotics will be the next group after fungus that will benefit if all the fungus were to die a sudden death.
As the protist group consist of mostly disease causing organisms and plants are one that take the benefit from the decomposed material while animals are the those that feed on organisms from first and second tropic level.
Prokaryotes mostly have single celled organisms such as bacteria which help in decomposition of the organic waste left by the higher organisms
I believe the answer is a mutation.
It is simply transportation
