I believe it is BaS I hope this helps!
The two systems would be respiratory and circulatory i think not completely sure tho <span />
Answer:
C
Explanation:
Spontaneous combustion is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self-heating which rapidly accelerates to high temperatures) and finally, ignition.
Answer:
Released into the atmosphere
Explanation:
The carbon that the plant had been storing when it was alive, would be released upon death into the soil
