Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Possibly meters or feet/yards.

A walk through a neighborhood would be less than a mile/kilometer but much further than an inch/centimeter.

Explained

Step-by-step explanation:

As Julia is going for a walk through the neighborhood feet,yards or meter   is most appropriate for measuring the distance she covered as the walk is generally is in few yards or meters.Using kilometers in place of yards or feet is not appropriate because walk is generally  of short nature .

Using millimeter or centimeter is also not apt because it will unnecessarily increases the calculations.

what is a pre-existing condition claus?

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.