Fill in the blanks with appropriate words :
Nylon fibre is used in making ropes for rock climbing and parachutes because it is a very _____ fibre.

Explanation

To fill in the blank in the statement "Nylon fibre is used in making ropes for rock climbing and parachutes because it is a very _____ fibre," we need to identify the characteristics of nylon fibre that make it suitable for these applications.

### Step-by-Step Solution:

1. **Identify the Use of Nylon Fibre**: The question states that nylon fibre is used to make ropes for rock climbing and parachutes. This indicates that the fibre must have certain properties that make it suitable for these demanding applications.

2. **Consider the Characteristics Required**: Ropes used in rock climbing must be able to support heavy weights and endure significant stress without breaking. Similarly, parachutes must be strong enough to carry the weight of a person safely during descent.

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