List the four ways how the use of auxins may help in obtaining better yield of fruit crops.

Explanation

### Step-by-Step Solution

1. **Promotion of Rooting**: Auxins, such as Indole-3-Acetic Acid (IAA) and Indole-3-Butyric Acid (IBA), stimulate root formation in plants. This enhanced root development leads to better nutrient and water uptake, which is essential for overall plant growth and fruit production.

2. **Enhancement of Flowering**: Auxins play a crucial role in the flowering process. By promoting flowering, auxins can increase the number of flowers that develop into fruits, thereby contributing to a higher yield.

3. **Induction of Parthenocarpy**: Auxins can induce parthenocarpy, which is the development of fruits without fertilization, resulting in seedless fruits. This is particularly desirable in many fruit crops as it can lead to higher marketability and consumer preference.

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