Which item is not associated with the phylum rhodophyta? [red algae, carageenan, agar, algin]

The item which is not associated with the phylum Rhodophyta is algin

This is what i found on google “phytoplankton, tiny organisms that live in the ocean, are autotrophs. some types of bacteria are autotrophs. most autotrophs use a process called photosynthesis to make their food.” i hope this you for what your looking for

Hahaha good one. you ? & oop