I think the answer is Releasing a black powdery substance on their trunks or shifting their range toward the poles.
A chloroplast are used for the process of photosynthesis which makes food
Homogeneous chromosoms pair up
Carbon is 6
Iridium is 77
Helium is 2
Sulfur is 16 ( not sure)
Hydrogen is 1
So
Hydrogen
Helium
Carbon
Sulfur
Iridium
Sorry if I’m incorrect.