Why are females in control of sexual selection and the evolution of males?

What protects the lining of the stomach from acidic gastric juices?

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Could someone me with number one you