get_avatar |and| get_the_author_meta – Author Box

<div class="author-section">
    <div class="row">
        <div class="col-md-3">
            <?php 
                echo get_avatar(get_the_author_meta( "ID" ));
             ?>
        </div>
        <div class="col-md-9">
            <h4><?php echo get_the_author_meta( "display_name" ); ?></h4>
            <p> <?php echo get_the_author_meta( "description" ); ?></p>
        </div>
    </div>
</div>