You have not stated your website Name or address here. Anyhow, some basic requirement is very important to get Adsense approval.
First one is, domain matching contents. The next one is, author profile with detail and it shall let Google (reviewing team) knows that you are above 18 years old, your profession detail and other required personal data in order to ensure that you are qualified.
The unique content post must be there on your website which shall be like search engine friendly. The content needs to be useful to visitors and matching advertiser requirement for mutual benefit.
The domain you register or use shall not have any bad remark in the past (in case if someone have registered it long back and sold it) and it is better to be and buy as a new domain name. The website content shall be without any crawling errors.
Regular posts are very important on your website beside active participation online for various contribution. The website must be above six months old and shall contain enough quality and unique posts, reasonable regular traffic and good history.
The above basic requirement is enough to get Adsense account approval. In case, if you match the parameters as mentioned above and Adsense team rejected your application then still don't worry, try to re-apply once in a month (including up to date contribution) till you get Adsense approval.