What is the independent variable in this experiment (i. e, the variable you manipulate )

They said i have got a sign of tuberculosis what should i do

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.

Which best describes what you will do in the reaching your academic potential course?