Statement 2 - 'Fresh water is essential to all life on Earth' and statement 4 - 'Most of Earth’s water is stored in the oceans', are true.
Explanation:
Statement 1 - Ponds are generally classified as a source of fresh water.
Statement 3 - Only 2.5% out of all the water present on Earth is fresh water.
Statement 5 - Oceans indeed are the largest source of water, but unfortunately not freshwater. Ocean water cannot be used for most basic day-to-day operations.