Explanation:
Answer: Sher Shah built an excellent network of roads to improve the communication system. He built four major roads among which the Grand Trunk road was the longest and the most important. It connected Sonargaon in the east to Peshawar in the north-west.
Rivers typically come from underwater springs. They can also form from mountains and hills from melted snow.
Answer: divide into three stages on the change of plane configuration
Explanation:
The anatomy of sponge which causes water to flow through it is the poriferan ventilation general anatomy.
Sponges do not have nerves or muscles and they do not move their only way which is relying on water flow in order to remove movement of sperm, remove gas exchange, remove wastes, and bringing food.
Because of architecture of sponge and action of choanocytes then the flow of water is being utilized efficiently by the sponge.
Water flows to spongocoel and to sponge through small openings which are found in the sponge, and out of sponge through Osculum which are the large openings.
