A tectonic plate is a massive, irregularly shaped slab of solid rock. (via https://pubs.usgs.gov/gip/dynamic/tectonic.html)
Explanation:
The Earth’s outer shell is divided into a patchwork of large tectonic plates that move slowly relatively to each other. (via https://www.gns.cri.nz/Home/Learning/Science-Topics/Earthquakes/Earthquakes-at-a-Plate-Boundary/Tectonic-Plates-and-Plate-Boundaries)
Plate tectonics is a scientific theory describing the large-scale motion of the plates making up Earth's lithosphere since tectonic processes began on Earth between 3.3 and 3.5 billion years ago. The model builds on the concept of continental drift, an idea developed during the first decades of the 20th century
When the sun, moon, and Earth are aligned, the tidal force of the sun works with the tidal force of the moon. The combined pull can cause the highest and lowest tides, called spring tides.
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.
