development

Examines how butterflies reproduce and how caterpillars become butterflies.

Describes the structure and purpose of leaves, the ways in which they change as part of the natural cycle of the seasons, and the process that creates their autumn colors.

Describes the life cycle of an apple from its initial appearance as a spring bud to that point in time when it becomes a fully ripe fruit.

Describes how birds mate, how chicks develop inside the eggs, how eggs hatch, and how different baby birds grow and learn to fend for themselves.

Follows an apple tree through the four seasons, detailing the yearly growth cycle and examining the ecosystem of the entire apple orchard.