Biology

The correct answer is: D.It is a slow and steady accumulation of small changes over time.

Explanation:

The gradualism theory proposes that new species evolve through the slow, steady accumulation of small genetic changes over long periods of time. These incremental changes accumulate gradually within populations, leading to the eventual emergence of new species. This process contrasts with the idea of rapid, sudden shifts seen in other evolutionary theories like punctuated equilibrium.

The other options:

A.It happens only in large populations: Gradual...