Do i have mucle or fat tissue ? I think i mostly likely have muscle , deatils inside , which is it?

Question

ok , im 15 years old and i am active somewhat throughout the day . Im 5'5" and weigh 115 lbs , but i think i look more like 100-105lbs because i look kind of thin to weigh that much , and my friend guessed i weigh about a 100lbs also . I wear a size 1 and my cousin who is just 5lbs heavier than me wears a 5 .(she is the same height) I can also eat and consume large amounts of foods/calories and not gain any weight . (i do gain like 1-2lbs but its water weight and goes away in like 2-3days).
also when i flex my stomach and legs muscles i feel really hard muscle tissue and its very solid , there is a thin layer of fat on top of that , but not alot , just a small amount . Also when im walking and as i walk i can feel the muscle tisse in my legs . but my legs dont look muscular , so im not sure if this is muscle or fat tissue / what do you think?

Answer 1

i think it is muscle tissue.

Answer 2

You have great muscle tone without being muscular.* Muscle is actually heavier & weighs more than Fat. Looking great.*