Give a short overview of the scientific achievments of halley

Halley — the traditional pronunciation of the name usually rhymes with valley — was born Nov. 8, 1656, in Haggerston, Shoreditch, London, England. His father was a prosperous soapmaker and property owner. Halley was tutored privately at home before entering St. Paul's School, where he excelled in mathematics and astronomy.

Halley entered Queen's College, Oxford, in 1673, when he was 17 years old. He brought with him a fine collection of astronomical instruments purchased by his father. While still an undergrad, he became a protégée of John Flamsteed, the Astronomer Royal. Halley made important observations at Oxford, including an occultation of Mars by the moon, and published papers on the solar system and on suns

The correct option is this: sample containing 30% sand, 35% clay and 35% silt [a].for the question given above, we are told that corn grow best in clay loam soil.according to the explanation in the question, a clay loam soil is a soil that have more of clay than both sand and silt. from the options given in the question, the best option we can go for is a, this is because, it is the only option that have the highest percentage of clay compare to other options.