I do not any invalid activity. But I do not know why Google disabled my AdSense Account. Anybody can help me about this matter?
They only disable accounts if there is a breach of their TOS. Once banned it's virtually impossible to get back in, so best to look for an alternative and play fair in future.
The reason is adsense trying to kick out those publisher that provide low quality click and/or low quality website, to avoid their ads appear at those low quality website/blog
Chitika is the best alternative to Google AdSense. The best thing of Chitika is we can withdraw our money to paypal when our balance reaches to $10.00 .
adsense is very very strict in terms of protecting its advertisers interests, you may received fraudalent clicks from some one else, contact google and clear the situation.