Query post to display its term also

queryPostAndDisplayItsTerm

<?php
$args = array(
    'post_type' => 'post',
);
$query = new WP_Query($args);
while ($query->have_posts()) : $query->the_post();
    ?>
    <div class="news-alert">
        <?php  $term= wp_get_post_terms($post->ID, 'category', array("fields" => "all"));
        print_r($term);?>
        <h3 class="<?php echo $term[0]->slug; ?>"><?php the_title();


            ?></h3>

        <?php the_content(); ?>
    </div>
    <?php
endwhile;
wp_reset_query();
?>