the breathing rate is an adult humans is

Options

A. 12-16 times/second
B. 12-16 times/ minute
C. 12-18 times/ second
D. 18-20 times/ minute

Answer

To solve the question regarding the breathing rate in adult humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Breathing Rate**:
- The breathing rate, also known as the respiratory rate, refers to the number of breaths taken in a minute. It includes both inhalation (breathing in) and exhalation (breathing out).

2. **Identify the Normal Breathing Rate for Adults**:
- Research and studies indicate that the normal breathing rate for an adult human is typically between 12 to 16 breaths per minute. This range can vary slightly based on individual health and activity levels.

3. **Analyze the Given Options**:
- The options provided are:
- A) 12-16 times per second
- B) 12-16 times per minute
- C) 12-18 times per second
- D) 18-20 times per minute
- We need to determine which of these options correctly represents the normal breathing rate for adults.

4. **Evaluate Each Option**:
- **Option A (12-16 times per second)**: This is incorrect as it is an unrealistic rate for breathing.
- **Option B (12-16 times per minute)**: This matches the established normal range for adults and is likely the correct answer.
- **Option C (12-18 times per second)**: This is also incorrect for the same reason as option A.
- **Option D (18-20 times per minute)**: This is higher than the normal range for adults and is therefore incorrect.

5. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **B) 12-16 times per minute**.

### Final Answer:
The breathing rate in adult humans is **12-16 times per minute**.