Fill in the following blanks with suitable words :
The changes occurring in body and mind during adolescene are a natural part of ………………….. Up.

Explanation

To fill in the blank in the sentence "The changes occurring in body and mind during adolescence are a natural part of ………………….. Up," we need to identify the appropriate phrase that describes the process of development during this stage of life.

### Step-by-Step Solution:

1. **Identify the Stage of Development**: The question refers to the changes that happen during adolescence, which is a significant period of growth and development in both the body and mind.

2. **Consider the Context**: Adolescence is characterized by physical changes (like growth spurts and development of secondary sexual characteristics) and mental changes (such as increased cognitive abilities and emotional maturity).

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