responsiveness
noun /rɪˈspɒnsɪvnəs/
  /rɪˈspɑːnsɪvnəs/
[uncountable]- responsiveness (to something) the ability to react quickly and in a positive way to something
- a lack of responsiveness to client needs
 
 - responsiveness (to somebody/something) an interested and enthusiastic reaction to somebody/something 
- His letters express his profound responsiveness to nature and beauty.