1) The process of photosynthesis, performed by plants, algae, and some bacteria, is responsible for producing the oxygen we breathe.

2) The tongue of a blue whale is so big that about 50 people could stand on it.

3) The word "umbrella" contains three vowels: U, E, and A.

4) The concept of augmented reality (AR) involves overlaying digital information and virtual objects onto the real world, enhancing the user's perception and interaction with the environment.