A major obstacle to developing good human relations skills is that people fear of taking risks.
Answer:
heat from the decay of radioactive elements.
frictional heating, caused by denser core material sinking to the center of the planet
Explanation:
I belive its cave. Hope this helps. <span>(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧</span>
A pen
Food
Scissors
Book
Headphones
Phone case
