You are concerned with surveying the protozoa in the arboretum soil. While most commonly thought to live exclusively in aquatic environments, protozoa can play an important role in the nutrient cycling that takes place in soil. In addition, protozoa can help maintain the proper balance of bacterial populations within soil, as bacteria are a primary source of food for protozoa.
Protozoa are extremely diverse. However, there are three characteristics common to all organisms called protozoa. What are these three characteristics?

Choose the answer that best describes the three characteristics common to all protozoa.

eukaryotic, contain chloroplasts, produce energy via mitochondria
eukaryotic, use cilia for motility, produce energy via mitochondria
eukaryotic, unicellular, lack a cell wall
eukaryotic, reproduce sexually, contain chloroplasts