Please help me
If animal cells don’t have chloroplasts, how do they obtain energy?

Plants don't get their sugar from eating food, so they need to make sugar from sunlight. ... Once the sugar is made, it is then broken down by the mitochondria to make energy for the cell. Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria.

They obtain their energy through the proteins the host (animal) consumes.

Hope this helps

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.