Adiatom has a cell wall made of
calcium
chitin
silica
cellulose

selica is what the cell wall is made of 

Secila is the correct answer i hope this helps

Balkan nationalism increased tensions between austria and russia

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.