Mixtures can be separated my physical means is true
mixtures are made up of more than one component is true
all else is false I believe
The answer to the question above is the forearc basin.
Forearc basins are characterized by thick sequences of relatively underformed sedimentary rocks. Examples of the forearc basins are Banda Forearc, Luzon arc-forearc, Tohoku forearc, Central Andean forearc, Savu-Wetar forearc, and between the Western Cordillera and Peru-Chile Trench.
Let's see which option fits with each characteristic.
Multicellular, or having more than one cell, could be any of these Kingdoms. These are all eukaryotic kingdoms, and eukaryotes cannot be unicellular.
Heterotrophic, or something that cannot produce its own food, can be all of these except Plantae, plants of this kingdom are autotrophic, as they mainly produce their own food (think photosynthesis).
Having a cell wall applies to all of these except Animalia. Animal cells don't need cell walls, as they don't require such a rigid structure as plants. Animals will typically have other supporting structures, such as bones or hydrostatic skeletons.
Being unable to move applies to all of these Kingdoms except Animalia and Protista (which move using their cilia or flagella). Plantae and Fungi don't have the means to move by themselves.
So, the only kingdom that has not been ruled out by one of the criteria is Kingdom Fungi !
The smallest thing they study is cells, i think!
hoped this helped!!
