Explanation

Let's calculate what needs to be added:

(7 + 2a - a² + 4a³) - (2a³ + a² - 3a - 1)

= 7 + 2a - a² + 4a³ - 2a³ - a² + 3a + 1

= 2a³ - 2a² + 5a + 8

Explanation

A good topic sentence introduces a general idea; this sentence is too specific and personal.

It doesn't set up a broad theme for a paragraph like a proper topic sentence should.

Explanation

In conditional sentences, "shall" is used with "I" and "we" to express future actions.

It is used here to indicate what will happen if the condition (rain) occurs.

Explanation

A society is a collection of individuals who have organized themselves into a distinct group, typically sharing common laws, institutions, and cultural practices.

It represents a broader structure than a community or family, encompassing a larger group of people with shared norms.

Explanation

Given:

Asad : Sania = 2 : 3

Sania : Fahad = 4 : 3

To find the continued ratio, we need to make Sania's ratio equivalent in both. Let's adjust the ratios:

Asad : Sania = 2 : 3 = 8 : 12 (multiplied both parts by 4)

Sania : Fahad = 4 : 3 = 12 : 9 (multiplied both parts by 3)

Now, combining them:

Asad : Sania : Fahad = 8 : 12 : 9

Explanation

Recollection has the suffix "-tion," which turns a verb ("recollect") into a noun.

A suffix is a word part added at the end to change the meaning or function.

Explanation

چمچ ایک مذکر لفظ ہے، اس لیے "وہ" کی ضمیر بھی مذکر ہونی چاہیے۔

صحیح جملہ یوں ہونا چاہیے: چمچ رکھ دو، وہ گر جائے گا۔

Explanation

An intransitive verb does not need a direct object to complete its meaning.

In "A candle was glowing," "glowing" is intransitive because it does not act on any object.

Explanation

White blood cells are called leucocytes, not red blood cells.

Red blood cells are called erythrocytes.

Explanation

An aquifer is a layer of rock or sediment that stores and transmits groundwater.

Porifera relates to animals (sponges).