Chloroplasts contain the green pigment chlorophyll.
Chlorophylls are the pigments of photosynthesis.
Photosynthesis takes place in chloroplasts.
Photosynthesis takes place in 

A: chloroplasts
B: sunlight
C: silk plants
D: peachleaf willow
E: Most plants
F: oxygen plants
G: chlorine plants
H: In their leaves