Which of the following is an aldehyde?
H H H
O A. H-C-C-C-
=0
07
31
H H H
H
H HH
O=o
O B. H-C-C-C
10_H
H HH
НІНІН
40
O C. H-C-C-C-c
10_CH
H H
Н
H HH
D. H-0_CLC
20
CH,
H
HH

A1 a 2 a 3 ooh lol i think that's it

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : )