Answer:
the possible gametes are Aa,Aa,Aa,Aa
Needles.
Sharing needles or things that you can eject through your skin (ex. drugs)
Infected tattoo needle that wasn't cleaned and disinfected properly
Pressure decreases due to there being less gas above you
The reactivity of an atom is due to the number and arrangement of Electrons (b) in the outer energy level.
Electrons "bond" they're the ones that react to create other elements.
Examples: Salt (NaCl) Carbon Dioxide (CO2)
And so on, and so forth. Thus, your answer....B.
