Combine the two sentences into one as shown below.
The camera breaks down frequently.
It makes him upset.
The camera breaks down frequently, which makes him upset.
1
Ben received a good review of his book.
It encouraged him to keep writing.
Ben received a good review of his book, which encouraged him to keep
writing.
2
The use of plastic bags was prohibited.
It reduced waste and pollution.
The use of plastic bags was prohibited, which reduced waste and
pollution.