Choose the true sentence

To choose the true sentence, we need some sentences to evaluate. Let's consider the following options: 1. The Earth is flat. 2. The Earth orbits around the Sun. 3. Water boils at 100 degrees Celsius at sea level. 4. Oxygen is a noble gas. 5. Plants perform photosynthesis to produce food. Now, let's analyze each sentence to identify the true one: 1. The Earth is flat - This statement is false. We know from scientific evidence that the Earth is not flat but is an oblate spheroid. 2. The Earth orbits around the Sun - This statement is true. The Earth revolves around the Sun in an elliptical orbit. 3. Water boils at 100 degrees Celsius at sea level - This statement is true. At sea level, water boils at 100 degrees Celsius. 4. Oxygen is a noble gas - This statement is false. Oxygen is a chemical element found in the air we breathe and is not a noble gas. 5. Plants perform photosynthesis to produce food - This statement is true. Plants convert sunlight, water, and carbon dioxide into energy-rich sugars through the process of photosynthesis. Therefore, the true sentence among the options provided is: **Water boils at 100 degrees Celsius at sea level**.