Question

Julie finds a snail on the sidewalk and wants to know whether or not the snail moves throughout the day. She places a single mark on the sidewalk next to the snail. What will Julie use the mark for initially?

Answer 1

initially the mark is used to monitor movement of the snail.
if there are options i could give a more specific anwser

Answer 2

To check the movement of the snail.

Step-by-step explanation:

She will mark a base line to know if the snail started movement, at the end of the day she can measure from her first line to her last to see how far the snail went.