End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://medufile.farafile.ir/file/49471/طرح-درس-زیستگاه-علوم-چهارم-با-روش-حل-مسئله