Answer:
1. Evolved
2. Develop
3. Expand
4. Grows
5. Will survive
6. Will last
7. Continues
8. Remain
9. Danger
10. Trouble
11. Threat
12. Risk
Step-by-step explanation:
Let's go over the tenses and reasons for problems 1-4 as examples for reasoning:
1. Evolved. The word "evolve" is appropriate here because the homo erectus(upright man), evolved into the homo sapien (wise man). "Evolve" is in its past tense because the event in reference happened many years ago.
2. Develop. Mountain gorillas don't evolve or expand, so those two are wrong. Although grow may be appropriate here, in #4, grow is the only acceptable option for bamboo, and the same word cannot be used twice. "Develop" is in plural and present tense because mountain gorillas are still developing today and there are multiple of them, not just one.
3. Expand. Pufferfish can physically get bigger, as opposed to evolving, developing, or growing. "Expand" is in plural and present tense because there are multiple pufferfish and they still exist (therefore they still expand).
4. Grows. The last part of the given prompt says "Up to 100 cm in 24 hours". From this, one can infer that they are talking about the growth of bamboo, not the development, evolving process, or expansion. "Grows" is in singular and present tense because the sentence refers to the entire one species (as opposed to saying bamboo plants/bamboo stalks), and bamboo still grows today.