WhatsApp is taking images from my gallery

Hi,

That's suspicious... First of all, make sure you're using the official WhatsApp app - you can download it from this link - and uninstall any modified version of WhatsApp.

If you're using the official app, check your phone for malicious apps. A factory reset may be necessary if you suspect suspicious activities when using your phone. However, if someone else has access to your phone, it may be possible that it is simply that person who's sending your images...

Hope that helps.