They all produce milk, have fur, and are warm blooded. Platypuses are crazy though and lay eggs even though they’re technically mammals too.
A - Golgi apparatus
B - Nucleolus
C - Endoplasmic reticulum
D - Mitochondrion
E - Ribosomes
F - Lysosome
Hope this helps! Good luck! :D
I haven't done biology is a while, but I do believe that this is correct!