alguien me puede ayudar esta tarea se entrega mañana, porfis, ahi les va la tarea, descripción de la problemática de la sequía. Por favor es para mañana, y les doy corona.​

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