During the colonial period, British capital was primarily invested in agriculture. This means that the majority of the British investments were directed towards the development and expansion of agriculture in the colonies. Agricultural activities such as plantations and farming were seen as profitable ventures, and the British invested heavily in these areas. This investment aimed to exploit the natural resources and labour available in the colonies for the benefit of British trade and economy. While there were also investments made in other sectors such as infrastructure, industry, and services, agriculture received the largest share of British capital. It is important to note that this answer is based on a general understanding of the colonial period, and regional variations and specific contexts may exist.