Question

for example, autocorrect makes typing easier, but it can also predict the wrong word and create confusion. plastic bags helped the environment in some ways, but they also had many harmful effects on the environment. antibiotics are helpful invention, because they cure diseases by killing harmful bacteri a less another

Explanation:

We need to choose the correct phrase to complete the sentence "Antibiotics are ____ helpful invention, because they cure diseases by killing harmful bacteria". Let's analyze the options:

• "a less": This doesn't make sense in the context. "Less" is used with uncountable nouns or for comparison, and here we need to refer to antibiotics as one of the helpful inventions, not a comparison of "less helpful".
• "another": This fits. Antibiotics are one more (another) helpful invention, as they have the benefit of curing diseases by killing harmful bacteria.

Answer:

another