Which of the following could be considered a scientific statement? (A) I believe there is life on other planets.
(B) I observed that bees prefer red flowers.
(C) I think cake tastes much better than cookies.
(D) I consider yellow a cheerful color.

b because the rest are opiniones

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer