Here's why:

* Chloroplasts are the organelles responsible for photosynthesis, the process by which plants convert sunlight into energy. Animal cells do not need to perform photosynthesis as they obtain energy by consuming other organisms.

The other options are present in animal cells:

* Mitochondria: The "powerhouse" of the cell, responsible for producing energy (ATP).

* Nucleus: Contains the cell's genetic material (DNA).

* Cell membrane: The outer boundary of the cell, regulating what enters and exits.