A) A ball is falling freely under the action of gravity, when its downward speed is 8.0m/s, it explodes into two equal parts. One part goes straight up to a height of
12m above the explosion point. What is the velocity of the other part just after the
explosion. Take g
9.8ms-2​

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Phagocytes contain digestive enzymes to facilitate the process of phagocytosis