mate or mating is the only term I have heard.
ecosystem
Plants and animals have important symbiotic relationships. These relationships are because insects pollinate the flowers and also eat the flowers nectar. This is a form of mutualism.
politics
It showed that different-looking animals are actually related. It showed new evolutionary relationships between animals. it changed ideas about which animals were closely related
The term is 'thermodynamics'. It is a branch of physics that deals with the relationships and conversions between different forms of energy.
The term relationship refers to the personal interaction between one or more people. This could be a one-on-one interaction, as in a romantic relationship, or a family situation, i.e. the relationship between parents and their children. It could also refer to relationships between friends, which could be different depending on the separate groups of friends involved. It could also refer to the connection between humans and their domestic animals, or to the connection between animals themselves.
Clues can be found out about the evolutionary relationships of animals by studying fossil records.
they "Banged" like mad animals everyday. trust me, i have paintings.
Everything from where they live to body structure. Sometimes even size.
Yes, there are relationships between living and nonliving things. For example: Without water (which is a nonliving thing) we and water animals can't survive.
The term defined as the study of energy and its transformations is thermodynamics. It deals with the relationships between heat, work, and energy in systems.
This is a wonderful question!! But no worries, relationships are simply a powerful bond between two objects/people/animals. Relationships don't always have to be associated with people. relationships could be mathematical and scientific too. but either way, relationships will always be difficult to understand!