The correct response is:
Yes; they both need mitochondria for cellular respiration.
Both animal and plant cells contain mitochondria because they are essential for cellular respiration, which is the process that generates ATP (the energy currency of the cell) by converting nutrients into usable energy. While plants also have chloroplasts for photosynthesis, they still rely on mitochondria for energy production, especially at night or in tissues that do not perform photosynthesis.