According to «Solutions in Parenting,» every child has a deep biological need for a connection with parents or primary caregivers. (oureverydaylife.com)
This company is dedicated to meeting the nutritional and biological needs of dogs and cats based on their natural evolutionary diet which is primarily composed of animal proteins and fats. (pawster.com)
They may have very complex behaviour, but it is essentially focused on biological needs. (faith.org.uk)