Answer:
C) fungi
Step-by-step explanation:
In the given question, the characteristics given are:
1. Nucleus is present: confirms that the organism is a eukaryote as prokaryotic do not possess nucleus therefore the organism is neither bacteria nor archaea.
2. Do not perform photosynthesis therefore the organism is neither a plant nor algae as both are photosynthetic.
3. Is heterotrophic: the fungi are heterotrophic as its mode of nutrition that is they obtain the nutrients from the external environment.
Thus, Option-C is the correct answer.