With reference to an example discuss the characteristics of and threats to a distinctive coastal reef ecosystem. (8 marks) please write a big paragraph. Will mark as brainliest

Explain how a convection current in the earth is formed.

What is the difference between emigrate and immigrate? ?

Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.