Respuesta :

Answer:

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