**Core Concept**
The major goals of growth modification in orthodontics involve guiding the development of the jaw and facial structures to improve their alignment and function. This is achieved through various techniques that influence the growth patterns of the **mandible** and **maxilla**. The primary aim is to address issues such as overbites, underbites, and crossbites.

**Why the Correct Answer is Right**
Since the correct answer is not specified, we'll discuss the general principles. Growth modification aims to correct skeletal discrepancies by utilizing appliances that direct the growth of the jaws. This can involve the use of **functional appliances** that promote **mandibular growth** or **reverse pull headgear** to restrict **maxillary growth**. The goal is to achieve a more favorable jaw relationship, enhancing both **aesthetic** and **functional** outcomes.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details, it's challenging to address why each option might be incorrect directly. However, incorrect options might include those that do not align with the principles of guiding jaw growth or that suggest growth modification is used for purposes other than improving jaw alignment and function.
**Option B:** Similarly, without specifics, we can say that any option not focused on the developmental aspects of jaw growth and its modification for orthodontic purposes would be incorrect.
**Option C:** This would be incorrect if it does not pertain to the orthodontic goals of growth modification.
**Option D:** Likewise, any option that does not support the concept of modifying jaw growth for better alignment and function would be incorrect.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that growth modification is most effective when initiated during the **pubertal growth spurt**, as this is when the jaws are most responsive to orthodontic interventions. Understanding the timing and the patient's growth stage is crucial for the success of these treatments.

**Correct Answer:** Correct Answer: D. To improve jaw function and aesthetics by modifying growth patterns.