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=>ANSWER: FALSE

1. Experts‟ definitions of migration tend to vary according to their area of study.

Keywords: definitions of migration, vary, study

In paragraph 3, the writer indicates that “But migration is a complex issue, and biologists define it differently, depending on what sorts of animals they study.”

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  experts=biologists
  

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  according to=depending on
  

=>ANSWER: TRUE

1. Very few experts agree that the movement of aphids can be considered migration.

Keywords: few experts, agree, movement of aphids, migration

Aphids are referred to in paragraph 5. Among the experts, we only know that Dingle and Berger have different definitions of migration. In this passage, the writer does not mention whether very few experts agree that the movement of aphids can be considered migration. So, the statement is not given

=>ANSWER: NOT GIVEN

1. Aphids‟ journeys are affected by changes in the light that they perceive.

Keywords: Aphids‟ journeys, changes, light

In paragraph 5, the writer says that “They allow for the fact that, for example, aphids will become sensitive to blue light (from the sky) when it‟s time for takeoff on their big journey, and sensitive to yellow light (reflected from tender young leaves) when it‟s appropriate to land.” So, the statement is true

=>ANSWER: TRUE

1. Dingle‟s aim is to distinguish between the migratory behaviours of different species.

Keywords: Dingle, distinguish, migratory behaviours

In paragraph 5, the writer says that “His definition is more intricate than Berger‟s, citing those five features that distinguish migration from other forms of movement.” Dingle does not aim to study the migration of different species,
he aims to study what makes migration different from other forms of animal movement. So, the statement is false.