Are all reflex actions involuntary, or are some voluntary?

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide