Stomata are tiny pores on the surface of leaves through which plants take in

The correct answer is Carbon dioxide.🔑Key Points:
-Stomata -​ 
-It is a pore found in the epidermis of leaves, stems and all other parts of the plant found above the ground.
-Through which plants take up carbon dioxide (CO2) and release oxygen (O2).​

🔴Additional Information:
-Following are the main functions of stomata-
-In exchange for gases
-It transports gases such as oxygen (O2), carbon dioxide (CO2), or water vapor (H2O gas) between the inner and outer surfaces of plant tissues.
-Removal of Water –
-Stomata also participates in the elimination of excess water in plant tissues,
-Thus it maintains the water balance of the plants.