To respond or react to requests, conditions, or demands; to accept or comply with something; to act in accordance with circumstances.
ご要望に応じて、プランを変更できます。
We can change the plan according to your request.
年齢に応じて料金が異なります。
Rates vary depending on age.
募集に応じて多くの人が参加した。
Many people responded to the call for applicants.