Want to loop thu PAGES with the category slug 'behavior'

customloop.php

<?php
			global $post;
			$my_query_args = array(
			    'posts_per_page' => 0, // change this to any number or '0' for all
			    'tax_query' => array(
			        array(
			            'taxonomy' => 'category',
			            'field' => 'slug',
			            'terms' => 'behavior',
			            'post_type' => 'page'
			        )
			    )
			);
			// a new instance of the WP_query class   
			$my_query = new WP_Query( $my_query_args );

			if( $my_query->have_posts() ) : while( $my_query->have_posts() ) : $my_query->the_post(); ?>

			    <li><a href="<?php the_permalink() ?>"><?php the_title() ?></a></li>

			<?php endwhile; endif; wp_reset_postdata(); ?>