The Lychee
The chestnut
Hawthorn.
If it is from a tree it could be a Sweet Gum Ball (the fruit of a sweet gum tree, not edible). I've heard a few people call it a spiny ball or spikey ball. It might also be a chestnut tree burr, a buckeye fruit husk or from similar nut trees.
They look like spiny shell with nut inside
Rambutan fruit, Lychee fruit, Rose Hips
stratum spinosum
It's a kind of spiny (prickly) anteater.
It is a type of fruit
Yes. It is not necessary to peel prickly pear fruit for freezing, blending, or extracting juice.
cactus
prickly pear
Could be a Madrone. AKA ( Arbutus or Strawberry Tree)
cacti