Carbon Dioxide (CO2):

* Stomata: CO2 enters the plant through tiny pores called stomata, located mainly on the underside of leaves.

* Diffusion: The CO2 moves from the air, where it's more concentrated, into the plant's leaves, where it's less concentrated. This movement happens passively through the process of diffusion.

Light Energy:

* Chloroplasts: The primary sites of photosynthesis in a plant are tiny organelles called chloroplasts. These are found within the cells of leaves and other green parts of the plant.

* Pigments: Chloroplasts contain chlorophyll, a green pigment that absorbs light energy. Chlorophyll absorbs light energy most efficiently in the red and blue regions of the visible light spectrum, which is why plants appear green (they reflect the green wavelengths).

* Light-Dependent Reactions: The light energy absorbed by chlorophyll is used to power the first stage of photosynthesis, called the light-dependent reactions. These reactions convert light energy into chemical energy in the form of ATP and NADPH.

Summary:

* CO2: Enters through stomata by diffusion.

* Light Energy: Absorbed by chlorophyll in chloroplasts, used to power photosynthesis.

Let me know if you'd like to know more about the process of photosynthesis!