I believe it is class, because species are divided into different classes, but families, for example: there's the cat family, and there's the dog family. classes: the carnivores, herbivores, omnivores OR mammals, egg laying, or hermaphrodites
The object is about to go/going down a hill, its increasing. b
Whatever floats by. sessile animals are stuck in place, and can't move. They're usually aquatic animals. Hope this helps! :)
conduction is solid
convection is liquid
radiation is anything that passes radiation
Interphase
A cell spends most of it's life in interphase, getting ready for mitosis or meiosis.