'Ecological' relates to ecology = study of organisms and their environment.

'Humorous' is the correct spelling.

A pilgrim journeys to a sacred or holy place for religious reasons.

'Autobiography' = life story written by the person themselves.

'White elephant' idiom = a possession that is useless or expensive to maintain.

'Concrete' figuratively = solid and definite → 'concrete proof' = clear evidence.

'Blow out' = extinguish a flame/light with air. Fits 'lights' and 'wind'.

Ongoing background action in past while decision was made → past continuous.

'Maiden speech' = the first speech given by a new member of a legislature.

'Out and out' = completely or in every way = 'thoroughly'.

'Between' = two people or things. 'Among' = three or more.

'Deny' = state that something is not true. Fits refuting someone's cleverness.

'While' connects two simultaneous actions. Ongoing sleeping → present continuous.

'Give up' (stop) + gerund (-ing) → 'gave up playing'.

Present perfect continuous + 'since' for a starting point in the past.

'One of' → singular verb. 'One of my friends is' is correct.

'Let' takes objective case. Objective of 'he' is 'him'. 'Let you and him' is correct.

'A Farewell to Arms' (1929) is a novel by Ernest Hemingway set during World War I.

'Animal Farm' (1945) is an allegorical novella by George Orwell.

Jonathan Swift is the foremost satirist in English literature — 'Gulliver's Travels' 'A Modest Proposal'.