The acceleration due to gravity on Earth, denoted by g, is approximately 9.8 m/s². While 10 m/s² is sometimes used as a rounded approximation for simpler calculations, $9.8

The acceleration due to gravity on Earth, denoted by $g$, is approximately $9.8 \, \text{m/s}^2$. While $10 \, \text{m/s}^2$ is sometimes used as a rounded approximation for simpler calculations, $9.8 \, \text{m/s}^2$ is the more precise standard value.

Let's evaluate the given options:

• a) $10 \, \text{m/s}^2$: This is a common rounded approximation.
• b) $9.8 \, \text{m/s}^2$: This is the standard, more accurate approximate value.
• c) $8.9 \, \text{m/s}^2$: This value is incorrect.
• d) $12 \, \text{m/s}^2$: This value is incorrect.

The most accurate approximation among the choices for the acceleration due to gravity on Earth is $9.8 \, \text{m/s}^2$.

The final answer is $\boxed{\text{B}}$