It depends on the amount of melanin in their skin
A high level of melanin in the skin. Melanin is what allows for any pigmentation in our skin. The more you have, the darker your skin is. That is also why some people have a easier time tanning than others.
Some people have naturally darker skin than others. It all depends on what genes you end up with. Some white people have naturally darker skin, and some black people have naturally lighter skin.
sunless tanning is were you lay down in a coffin of some sort and it produces UV light which makes your skin darker which means that you don't even have one glimpse of the sun which is sunLESS tanning
The color of your skin is going to depend on how the melanins in your skin are activated. For instance, some pale people only burn without getting color. Some dark skinned people will not have an obvious color change, but they will be sunburned. In any case, spending time in the sun in order to get darker skin is short-sighted in that the sun damage created will cause problems for you in the future. Dark spots, wrinkles, precancerous growths and other lovely effects are not fun to deal with as you age. If you must have a tan, try some of the tanning lotions that chemically change your skin color.
The Sun or tanning salons. That's why people choose NOT to tan! BUT IT IS GOOD TO GET SOME SUN! THE SUN GIVES YOU VITAMIN D, Which is always good to have! But tanning salons can RUIN your skin!
I suspect they think you have leathery skin. Do you have really tan skin? Do you spend a lot of time in the sun or tanning bed? That is when people get skin that looks leathery.
Because the lighter the pigment in your skin the less protected you are
they can but some people can get skin cancer for sitting in the sun for to long using tanning beds can give u skin cancer too.
Rub some dirt in it
Some examples of tanning accelerator lotions are: Conceited, JWOWW One and Done, JWOWW, Smile You're Darker, Girlfriend Sexy Bronzer, Fig Get Me Not, Girlfriend Sexy Pure.
It's genetics. Dark skinned people generally come from countries that have a higher exposure to sunlight, so their darker skin provides more protection against it. Lighter skinned people would probably come from countries of high latitude that don't receive as much sunlight, so they wouldn't need darker skin. It is in the skin's pigmentation and the activity of melanocytes within the skin.
No some countries like Africa where darker skinned peoples are indiginous are above it.