Tracheids, sieve-tube cells, vessel elements, and companion cells are all components of the

Tracheids, sieve-tube cells, vessel elements, and companion cells are all components of the Complex Permanent Tissue

Explanation:

Complex Permanent Tissue consists of Xylem and Phloem :

Xylem consists Tracheids and vessel element

Phloem consists of sieve-tube cells and companion cells

AS THESE ALL ARE UNDER COMPLEX PERMENANT TISSUE WE CONSIDER IN THIS GROUP

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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