An organism has the following characteristics.
-Eukaryotic
-Some are autotrophic, some are heterotrophic
-Some are multicellular, most are unicellular
-They can be animal-like, plant-like, or fungus-like

a - Domain Eukarya – Kingdom Animalia
b - Domain Archaea – Kingdom Archaea
c - Domain Eubacteria – Kingdom Eubacteria
d - Domain Eukarya – Kingdom Protista

Domain Eukarya - kingdom Protista

Explanation:

Kingdom Protista is a diverse group of eukaryotes which can be animal-like, plant-like or fungus due to their similarities. Although they have similarities with animals, plants and fungus, they are grouped separately since they cannot fit completely into those groups.  

Protists can be unicellular (like phytoplanktons ) or multicellular with microscopic or of huge enormous sized cells.  

Some of the protists can undergo photosynthesis to prepare their food but some live under a mutual relationship with other organisms and depend upon food with those organisms. So protists can either be autotrophs or heterotrophs.  

The protists have a nucleus in their cells and hence are eukaryotes.

Similar to animals they also have other organelles like endoplasmic reticulum, Golgi apparatus, mitochondria, cytoplasm.

Similar to plant cells, their cells have chloroplasts (autotrophs) and are covered with a cell wall.

Similar to fungi, certain protists can decompose the organic content and recycles them back to the environment. Plasmodium, slime molds are some of the protists.

a covalent bond, specfically triple bond