Living things have certain characteristics and behaviors that distinguish them from non-living things. One of these characteristics is the ability to respond to stimuli in their environment. In the case of the plant that Manya observed, it exhibited a specific response to the touch of an insect landing on its leaves. This behavior can be categorized as a response to touch, which is one of the characteristics of living things.

Living things can grow, reproduce, respond to stimuli, and move. Let's break down each of these characteristics and see how they apply to the plant in question.

1. Can grow:
Living things have the ability to grow and develop over time. This growth can be observed in various ways, such as an increase in size, the development of new structures, or the acquisition of new abilities. In the case of the plant, it can be inferred that it has the ability to grow since it is able to capture insects by shutting its leaves when they land on them.

2. Can reproduce:
Reproduction is another characteristic of living things. Living organisms have the ability to produce offspring, either sexually or asexually, in order to continue their species. While the plant's behavior of capturing insects does not directly relate to reproduction, it can be assumed that the plant is capable of reproduction as it is a living organism.

3. Respond to touch:
Living things have the ability to respond to stimuli in their environment. This response can be in the form of movement, changes in behavior, or physiological reactions. In the case of the plant, it responds to the touch of an insect landing on its leaves by shutting them like a shell. This response to touch demonstrates the plant's ability to react to stimuli.

4. Can move by themselves:
While it may seem that the plant does not move in the traditional sense, it does exhibit a form of movement. The closing of its leaves can be considered a movement, albeit a slower and more limited one compared to animals. This movement allows the plant to capture insects and is another example of a living thing's ability to move.

In conclusion, the observed behavior of the plant capturing insects by shutting its leaves demonstrates that it is a living organism capable of growing, reproducing, responding to touch, and exhibiting movement. Therefore, the correct answer to the question is option 'C' - 3 and 4 only.