Which change in plants is associated with inadequate watering?

The change in plants associated with inadequate watering is smaller flowers, which typically occurs due to stress conditions that affect the plant's ability to maintain healthy growth and reproduction. When plants do not receive enough water, they often conserve resources by reducing flower size or even flower number. Smaller flowers may be the result of the plant reallocating its energy towards essential functions such as survival rather than reproductive efforts, which are less critical under water stress.

Inadequate watering can lead to stress responses that prioritize vital growth processes over the development of flowers. Additionally, a lack of water can affect the plant's overall health, resulting in weakened systems that cannot support larger or healthier flowers. This serves as a survival mechanism, as the plant tries to cope with its limiting environment.

Other options like lush and towering growth, increased leaf size, and greater stem thickness are generally associated with adequate watering conditions, where the plant can thrive and invest in robust growth and larger structures. In contrast, smaller flowers indicate the adverse effects of insufficient water, marking it as the correct change associated with this condition.