The penguin has a sleek body that helps it to move quickly in water.
The correct answer is letter C
Alpha decay involves the loss of an alpha particle, aka a helium nucleus. This results in the mass number of the original element decreasing by 4 and the atomic number decreasing by 2. Assuming 23942u is uranium (92), the resulting element's atomic number is 90, making it thorium.
the answer is c, more heat is being released.
