We should give the elderly the respect they deserve.
Tips
usage
应有 is almost always used as an attributive adjective before 的: 应有的权利 (rightful rights), 应有的尊重 (due respect), 应有的待遇 (deserved treatment). The common phrase 应有尽有 (yīngyǒu jìnyǒu) means 'to have everything one could want.'