Posted by **LILY** on Thursday, November 29, 2012 at 11:11am.

HELP FAST!!!!!!!!!!!!!!!! If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called?

A. delta point

B. distance system

C. coordinate system

D. reference point

- science -
**Manpreet**, Thursday, November 29, 2012 at 11:20am
reference point

- science -
**lily**, Thursday, November 29, 2012 at 11:21am
thank you

- science -
**Me**, Thursday, January 9, 2014 at 3:06pm
D. Reference point

- science -
**m j j**, Monday, December 1, 2014 at 3:15pm
i agree its d

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