containing or using responses or antiphons recited or sung in alternation; "responsive reading"; "antiphonal liturgy"

readily reacting to people or events; showing emotion; "children are often the quickest and most responsive members of the audience"

readily reacting to suggestions and influences; "a responsive student"

That responds; ready or inclined to respond.

The ability to sense and respond to unpredictable changes in demand, supply, pricing, labour, competitors' moves, capital markets and the needs of all a company's constituencies – customers, partners, suppliers and employees.

susceptible to the feelings or attitudes of others; "keeping government in America responsive to the will of the people"

means an offer, with regard to a Bid or Proposal, that conforms in all material respects to the requirements contained in the Solicitation

Suited to something else; correspondent.

Responsible.