Spellings

The correct spelling is 'criticism' with an 'i' after the 'c' and ending in 'ism'. The other options have various errors: extra letters, wrong vowels, or incorrect endings.

The correct spelling is 'disastrous' - meaning causing great damage. The other options have incorrect double letters or wrong vowels. Remember it follows the pattern of 'disaster' plus '-ous'.

'Scene' is the correct spelling among the options. The word refers to a setting or view, or a division of a play/act. The other options - 'Cene', 'Sene', and 'Secene' - are all misspellings. This is a basic orthography question testing fundamental English spelling rules.

'Courtesy' is the correct spelling. The word comes from 'court' + 'esy' (a suffix meaning quality or state). The other options - 'Courtasy', 'Cortesy', and 'Courtesi' - are all incorrect spellings. This tests whether you know that the 'u' after 'cour' is retained and the suffix is '-tesy'.

The correct spelling is "adequate" with one 'e' after the 'd'. Option B (adeqate) is missing the 'u', Option C (adequete) has 'ue' instead of 'ae', and Option D (adiquate) incorrectly has 'i' instead of 'e'.

The correct spelling is "apparently" with two 'p's and an 'e' before the 'ntly'. Option A (apparentaly) has 'al' instead of 'ly', Option C (aparently) is missing a 'p', and Option D (apparantly) has 'an' instead of 'en'.

The correct spelling is "dwarf" with one 'f' at the end. All other options add unnecessary letters: Option A has 'ff', Option C has 'rr', and Option D has 'ww' before 'arf'.

The correct spelling is "Obviously" with capital 'O' and 'ou' after 'b'. Option A has 'e' instead of 'io', Option C has 'ili' instead of 'ou', and Option D is missing the 'o' after 'v'.

The correct spelling is "irrelevant" with 'rr' and double 'l'. Option B (irelevant) is missing an 'r', Option C (irrelavant) has 'an' instead of 'en', and Option D (irrelevent) has single 'l'.

The correct spelling is "rotational" with 'tion' suffix. Option B is missing the 'i', Option C has 'el' instead of 'io', and Option D adds an unnecessary 'e' at the end.

The correct spelling is "irregularly" with 'rr' and 'lar'. Option A has 'ee' instead of 'ir', Option B has 'er' instead of 'ar', and Option D is missing an 'r'.

The correct spelling is "asteroid" with one 'i' and 'oid' ending. Option A has 'ss' instead of 'st', Option B has 'e' instead of 'i', and Option D is missing the 'er'.

The correct spelling is "assertion" with 'ss' and 'ion'. Option A is missing the 'i', Option B has 'rr' instead of 'ss', and Option D is missing an 's'.

The correct spelling is "catalogue" with 'ue' at the end. Option A has 'gg' and 'ue', Option C has 'el' instead of 'og', and Option D is missing the 'u'.

The correct spelling is "Observatory" with 'or' and 'ory'. Option A has 'er' instead of 'or', Option C has 'et' instead of 'rv', and Option D has 'ar' instead of 'or'.