Let's observe the pattern:
2 → 6 (+4)
6 → 12 (+6)
12 → 20 (+8)
20 → 30 (+10)
30 → ? (+12)
So, the next term is:
30 + 12 = 42
Which letter replaces the question mark? A, D, G, J, M, ?
Rearrange the following parts to form a meaningful sentence. Select the correct option.
P: scientists have been researching alternative energy sources
Q: due to the rising concerns about fossil fuel depletion
R: and their impact on climate change
S: such as solar and wind power