Final answer:
The speed of a banana slug would best be represented by (2 × 10⁻³) meters per second (choice B).
Step-by-step explanation:
The speed of a banana slug would best be represented by (2 × 10⁻³) meters per second (choice B). This is because the value 10⁻³ represents a fraction of a meter, which is appropriate for the relatively slow speed of a slug. Choices A and D represent speeds of kilometers per second, which are much too fast for a banana slug. Choice C represents a speed of kilometers per second, which is also too fast for a slug.