The world's population is predicted to: a double by the year 2027 b : reach 10 billion by the year 2030 c : reach 4 billion in thirty-eight years

i think the answer is

mass

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a