How does nuclear fusion make life on earth possible

Which biochemical cycle is relied upon for plant photosynthesis

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

Identify the youngest layer in the figure ( have to click one letter)