Background picture not showing

I am attempting so as to add a {custom} background on a baby theme. Within the youngster theme’s features.php, I add add_theme_support( 'custom-background'); and the background choice seems below the “Look” menu as anticipated. I add the picture that I need, save, and nothing occurs. The picture will not seem because the background. What am I doing fallacious?

Utilizing model 4.3.1.

That is all that is in my youngster theme’s operate.php”

<?php

add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
operate theme_enqueue_styles() {
    wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/fashion.css' );

}

add_theme_support( 'custom-background');