Qualitative and Quantitative change are related to : 

The terms "qualitative" and "quantitative" change are often used in various biological and developmental contexts to describe how organisms or systems undergo transformation.

Key Points

• Qualitative and quantitative changes are closely associated with the processes of development and growth.
• Growth refers to the physical increase in size, quantity, or numbers, which is measurable (quantitative change).
• On the other hand, development refers to the progression through stages of complexity, differentiation, and specialization, leading to a qualitative transformation of the organism or system.
• This combination of measurable growth and developmental stages results in changes that are both quantitative and qualitative in nature.

Hint

• Growth cycle refers to the stages of growth, but it does not inherently account for the qualitative transformations in characteristics that come with development.
• Energy is a crucial factor for growth and development, but it does not directly explain the qualitative or quantitative nature of changes.
• Maturation is a process of becoming fully developed, but it emphasizes the final stages of development rather than the ongoing changes that involve both quantity and quality.

Hence, the correct answer is 'Development & Growth'.