Hello,
You need to create attributes Type, Weight (Kg) etc with appropriate terms, for example Egg and Eggless Please, read WooCommerce plugin documentation about this or watch video tutorial https://docs.woocommerce.com/document/managing-product-taxonomies/#section-3
After that change the type of your product to the variable and choose the necessary attributes. Please, read WooCommerce plugin documentation about this or watch video tutorial https://docs.woocommerce.com/document/variable-product/
The variable product is default WooCommerce plugin option. This is not our theme option.
Regards