Hello.
The answer is
<span>electron transport chain
</span>
The stroma is equivalent to the cytosol, it is the aqueous fluid in between thykaloid grana, where carbohydrate formation reactions occur in the chloroplasts of plant cells.
The electron transport chain is found in the thylakoid membrane
Have a nice day
There are five different layers in the earth atmosphere. First layer - Named the Troposphere, it is the lowest layer of the atmosphere and begins at the surface and extends to between 7 km (23,000 ft) at the poles and 17 km (56,000 ft) at the equator.