Explanation:
A. a chemical that kills plants and animals that come in contact with it
Chemoheterotroph photoheterotroph photoautotroph chemoautotroph.
<span>To generate oxygen in an apparatus, the gas stored must have oxygen in it. Then the remainder gas is either burnt or released in air. CO2 is one gas that has oxygen. If the apparatus has CO2, I can generate oxygen. After taking oxygen from CO2 in the apparatus. The gas which remains is C that is carbon. This gas is released in the air mostly in open.</span>
Answer is C - crust, mantle, outer core, inner core.
Crust -
Crust is the <em>outermost layer</em>. The thickness of the crust is about<em> 5 - 70 km.</em>
Mantle -
Mantle is the<em> second layer</em> from the Earth's surface. Thickness is about <em>2890 km.</em>
Mantle can be divided into two parts as <em>upper mantle and lower mantle.</em>
Outer core -
The thickness is about <em>2400 km</em>. It is made from mostly <em>iron and nickel.</em>
Inner core -
The <em>innermost part</em> of the Earth is inner core. Mainly made from <em>iron-nickel alloy</em>. It is solid sphere which has a radius <em>about 1220 km</em>.