Water! (abiotic)
If water runs out then everything dies! :)
Thanks for the opportunity to answer your question and I hope this help! :)
It is the presence of oxygen-bound hemoglobin that makes it bright red
Alkaline earth metals
Group 13 aka the boron family is categorized as alkaline earth metals
<span>Spermatozoa are the mature male gametes in many sexually reproducing organisms. Thus, spermatogenesis is the male version of gametogenesis, of which the female equivalent is oogenesis. In mammals it occurs in the seminiferous tubules of the male testes in a stepwise fashion.</span>
Autotrophs <span>produce their food by absorbing the sun's radiation</span>