**Answer:**

**Option (1)**

**Step-by-step explanation:**

Characteristics of the graph attached,

**1).** Heart rates of the teenagers (0 to 20 years) varies from 112 beats per minute to 72 beats per minute.

**2).** Heart rates of the adults (20 years to 50 years) remains constant (72 beats per minute)

**Option 1). **Since average resting heart rate of the teenagers decreases from 0 to 10 years, so at the 20 years of age heart rate will be less than a teenager of 20 years.

Therefore, statement **is** **not supported by the graph**.

**Option (2)**. A 20-year-old has the same average resting heart as at 30-year-old.** [True]**

Therefore, this option is **supported by the graph.**

**Option (3).** A 40-year-old may have the same average resting heart rate for 10 years.

**[True]**

Therefore, this statement is **supported by the graph.**

**Option (4).** The average resting heart rate for teenagers steadily decreases.

**[True].** There is a linear decrease in the teenagers heart rate shown in the graph.

Therefore, the given statement **is true and supported by the graph.**

**Option (1) will be the answer.**