Explanation

Angiography is a medical imaging technique used to visualize arteries and veins by injecting a contrast dye.

It helps in diagnosing cardiovascular diseases (CVDs) by detecting blockages or abnormalities in the arterial tree.

Explanation

The sentence describes a general truth or fact (Ali being brighter) and uses the simple present tense structure (is).

The Present Indefinite Tense is used to express habitual actions, general truths, or facts.

Explanation

"From" is used to indicate the origin of movement or action (e.g., "I came from school").

In reported speech, "where I came from" correctly follows the structure of indirect questions.

Explanation

The sentence refers to yesterday, indicating a past event, so past simple tense is needed.

"Did not come" is the correct negative form of the past simple tense, as "did" already carries the past meaning.

Explanation

Lowland plains cover more than 50% of the Earth's crust, including river valleys and coastal areas.

These regions are fertile and densely populated, supporting agriculture and human settlements.

Explanation

A black dwarf is the final stage of a low-mass star, after it has cooled and no longer emits significant heat or light.

It forms when a white dwarf loses all its residual thermal energy over billions of years.

Explanation

"Who stands first" is a relative clause because it describes "the boy" using the relative pronoun "who."

Relative clauses provide additional information about a noun and usually begin with who, which, or that.

Explanation

The sentence is in the past tense, as indicated by "the last match," so the past form lost is correct.

Lose is present tense.

Loses is singular present.

Has lost is present perfect.

Explanation

Alauddin Khilji annexed Malwa to the Delhi Sultanate in 1305 after defeating the Paramara dynasty.

His general, Ain-ul-Mulk Multani, led the conquest and became the governor of Malwa.

Explanation

The verb encouraged is followed by a gerund (winning), which functions as a noun in this context.

Gerunds are commonly used after verbs like encourage when referring to an activity or action.