Choosethecorrecttopicsentencetofillintheblank.为下面段落选择合适的主题句 Whenyoubuyinsurance,youenterintoawrittenagreementwiththeinsurancecompany.______.Aninsurancepolicyisanagreementbetweenyouandtheinsurancecompany.Itdescribeswhatisbeinginsuredandtheconditionsunderwhichprotectionistobeprovided.Thepolicyalsostatesthelimitsoftheprotection.Theinsurancecompanywhichprovidestheprotectionisknownastheinsurer.Thepersonorbusinessbuyingtheinsuranceisknownastheinsuredorthepolicyholder.Theinsurerandtheinsuredareknownaspartiestothecontract.