How can a chloroplast, a structure found in plant cells but not in animal cells, provide energy for BOTH plants and animals?

Chloroplasts are found in plant cells only because chloroplasts contain chlorophyll which is essential for photosynthesis. Chlorophyll traps sunlight and uses it to prepare food for plants by the process of photosynthesis.

ocean expansion, global warming is melting icebergs and causing water levels to rise.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.