<img class="resposive-img revealOnScroll" data-animation="bounceInLeft" width="100%" src="<?php the_post_thumbnail();?>">
<img src="<?php the_post_thumbnail();?>" class="resposive-img revealOnScroll" data-animation="bounceInLeft" width="100%">
<?php the_post_thumbnail('', array('data-animation' => 'bounceInLeft', 'class' => 'resposive-img revealOnScroll'));?>