In the following passage there are blanks, each of which has been numbered. These numbers are printed below the passage and against each, a few options are given. Find out the appropriate word which fits the blank appropriately. As the pandemic made its mark in 2022, the planet _________(I)_________ a series of growing environmental challenges. At the UN, the struggles of farmers and the global food system, the ________(II)_________ loss of biodiversity, and the ever-heating planet dominated the agenda, culminating at November’s COP26 climate conference. This challenge is especially ______(III)______ in India, where more than 700 million people depend on forests and agriculture for their sustenance. More than 85% of them are small and marginal landholders, leaving them especially _________(IV)_________ as the climate changes the world around them. Fortunately, pioneers across India are deploying a set of techniques, known as landscape restoration, that can _______(V)______ damaged ecosystems and ______(VI)____ biodiversity.

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**Solution:**

1. The sentence talks about the planet facing environmental challenges and the need to restore damaged ecosystems and biodiversity.

2. Among the options, **'improve'** fits best as it means to make something better, which aligns with restoring ecosystems and biodiversity.

3. Other options like 'rectify' or 'resolve' do not fit as naturally in this ecological context, and 'disapprove' or 'engage' are irrelevant here.

4. Therefore, the correct choice to fill the blank is **(a) improve**.

**Answer:** (a) improve

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