Help please please brainy please

A

Explanation:

The characteristic physical property of a substance will stay the same regardless of the amount of matter. The density, thermal conductivity, and boiling point of a substance will not change from the amount of matter, so the answer is A, mass. The mass of anything will change with the amount sampled.

I hope this helps ^^

Good luck

i dont know but thats a great qusestion

answer; mission;