down to

down to

1. ready for
2. with no one/nothing remaining but
3. Due to.

   It's down to me, the way she talks when she's spoken to / Down to me, the change has come, she's under my thumb.

   • 2005, Stel Pavlou, Decipher:

     The intermittent signal dropout was down to a faulty connection which he'd fixed in seconds.

   • 2011 May 16, James Mitchell Crow, “First signs of ozone-hole recovery spotted”, in Nature:

     That difficulty is down to significant natural variations in average Antarctic stratospheric springtime ozone levels from year to year

• up to

• up to