Answer:
B
Explanation:
Heat moves from warm to cold so that means that C and D are eliminated. Conductors cause heat to move quickly thus melting the ice faster.
B. Sunlight doesn't reach the bottom of lakes..
Let’s take grass and bunnies for example.
The grass is a producer and the bunny is the consumer. The bunny eats the grass that the ground produces.
Oxygen-16 and Carbon-12 are stableisotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 andUranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.
Answer is. uranium-238
