Question

how long is a human front tooth? select the best estimate. 10 millimeters 10 kilometers 10 centimeters 10 meters

Explanation:

Step1: Analyze each unit

• 10 kilometers is extremely large (used for long distances like between cities), so it's impossible for a tooth.
• 10 meters is also way too big (like the height of a small tree), not suitable for a tooth.
• 10 centimeters is about the length of a small toy, a human front tooth is smaller.
• 10 millimeters is 1 centimeter, which is a reasonable estimate for the length of a human front tooth.

Answer:

10 millimeters