A plant has weak stem and cannot stand upright. It spreads on the ground. It may be called*1 pointherbcreepershrubclimber

In this case, the plant that has a weak stem and spreads on the ground is best classified as a creeper. Creepers are plants that grow along the ground and do not have the strength to stand upright due to their weak stems. They often spread horizontally and can cover large areas.

In contrast:

• Herbs are plants with a soft structure, typically smaller, and can have upright or spreading growth.
• Shrubs are woody plants that are typically larger and can stand upright.
• Climbers are plants that can climb up structures or other plants but have a strong enough framework to do so.

Therefore, the correct answer is creeper.