Answer:
Colonial photosynthetic eukaryotes.
Step-by-step explanation:
Protista is a known example of colonial photosynthetic eukaryotes which means they have a Nucleus and other cell organelles such as Chloroplast, Mitochondria, etc. They are different in size such as from microscopic to large, and they can survive in all kinds of atmosphere. Colonial Protista is known as a broader group of multicellular species that forms colonies.
Some examples of colonial Protista are:
1) Golden algae belong to phylum Chrysophyta and they live in freshwater.
2) Green algae such as Volvox and they also create large colonies.