Which of the following statements about fluids is true ?

Options

A. Fluids rarely take the shape of their container.
B. Fluids include liquids and gases.
C. Fluids flow from low pressure to high pressure.
D. Fluids exert the most pressure in the downward direction.

Explanation

To determine which statement about fluids is true, let's analyze the given options step by step.

### Step 1: Analyze Option 1
**Statement:** "Fluids rarely take the shape of their container."
- **Explanation:** This statement is incorrect. Fluids, by definition, are substances that can flow and take the shape of their container. Therefore, this statement is false.

### Step 2: Analyze Option 2
**Statement:** "Fluids include liquids and gases."
- **Explanation:** This statement is correct. Fluids are classified into two main categories: liquids and gases. Both of these can flow and do not have a fixed shape, making this statement true.

### Step 3: Analyze Option 3
**Statement:** "Fluids exert the most pressure in the downward direction."
- **Explanation:** This statement is also incorrect. While fluids do exert pressure downwards due to gravity, they exert pressure in all directions. For example, if a fluid is in a container, it exerts pressure on the walls as well as the bottom of the container. Thus, this statement is false.

### Conclusion
After analyzing all the options, we find that:
- **Correct Statement:** Option 2, "Fluids include liquids and gases," is the true statement about fluids.